Site.Astrolabe History
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16 May 2014
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There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. [[http://astrolabes.org|James E. Morrison]], a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake which, as I feared, misses some key features which would enable it to actually work. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
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There are some 2000 astrolabes in museums around the world. This "astrolabe" however is certainly a fake. [[http://astrolabes.org|James E. Morrison]], a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake which, as I feared, misses some key features which would enable it to actually work. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
12 December 2011
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There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. James E. Morrison, a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake which, as I feared, misses some key features which would enable it to actually work. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
to:
There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. [[http://astrolabes.org|James E. Morrison]], a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake which, as I feared, misses some key features which would enable it to actually work. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
11 December 2011
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There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. James E. Morrison, a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
to:
There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. James E. Morrison, a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake which, as I feared, misses some key features which would enable it to actually work. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
11 December 2011
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There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. James E. Morrison, a world expert on these devices notes:
->What you have is not a working astrolabe, but a rather poorly executed fake. It cannot be used for any astrolabe function. Don't feel bad. I receive, on the average, an inquiry a month concerning "astrolabes" people have found and in the last 20 years only two have been real, working astrolabes.
->I have no idea when or where yours was made. It probably came from a family of engravers who may have seen or had an astrolabe described to them, which they attempted to copy with no background on what an astrolabe is, how it works or how to design one. The ones I usually see were made in Pakistan, India or the area around Syria. It's had to tell the origin of most of them. I can't speak for Malaysia, but the Middle Eastern fakes were mostly made for the European tourist trade. Some were probably made for or by astrologers who wanted to have a complicated looking instrument to impress their clients.
->I don't have an opinion on its age, but the engraving looks quite sharp so it may not be very old.
->Compare it to some of the specimens on the web and you will immediately see it has no stars, no almucantars, no divided scales, etc.
->BTW, there are about 2,000 old astrolabes in various collections. I have not heard of a quality astrolabe of any origin being found in some time, although some interesting quadrants have turned up.
->What you have
->I have no idea when or where yours was made. It probably came from a family of engravers who may have seen or had an astrolabe described to them, which they attempted to copy with no background on what an astrolabe is, how it works or how to design one. The ones I usually see were made in Pakistan, India or the area around Syria
->Compare it to some of the specimens on the web and you will immediately see it has no stars, no almucantars, no divided scales, etc
->BTW, there are about 2,000 old astrolabes in various collections. I have not heard of a quality astrolabe of any origin being found in some time, although some interesting quadrants have turned up.
to:
There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. James E. Morrison, a world expert on these devices notes that it is definitely not a working astrolabe but rather a poorly executed fake. He notes that in his experience only two of the various items people have asked him about have actually turned out to be genuine working astrolabes. He notes:
->I have no idea when or where yours was made. It probably came from a family of engravers who may have seen or had an astrolabe described to them, which they attempted to copy with no background on what an astrolabe is, how it works or how to design one. The ones I usually see were made in Pakistan, India or the area around Syria. It's had to tell the origin of most of them. I can't speak for Malaysia, but the Middle Eastern fakes were mostly made for the European tourist trade. Some were probably made for or by astrologers who wanted to have a complicated looking instrument to impress their clients. BTW, there are about 2,000 old astrolabes in various collections. I have not heard of a quality astrolabe of any origin being found in some time, although some interesting quadrants have turned up.
->I have no idea when or where yours was made. It probably came from a family of engravers who may have seen or had an astrolabe described to them, which they attempted to copy with no background on what an astrolabe is, how it works or how to design one. The ones I usually see were made in Pakistan, India or the area around Syria. It's had to tell the origin of most of them. I can't speak for Malaysia, but the Middle Eastern fakes were mostly made for the European tourist trade. Some were probably made for or by astrologers who wanted to have a complicated looking instrument to impress their clients. BTW, there are about 2,000 old astrolabes in various collections. I have not heard of a quality astrolabe of any origin being found in some time, although some interesting quadrants have turned up.
10 December 2011
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The
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There are some 2000 astrolabes in museums around the world. This "astrolabe" however is almost certainly a fake. James E. Morrison, a world expert on these devices notes:
->What you have is not a working astrolabe, but a rather poorly executed fake. It cannot be used for any astrolabe function. Don't feel bad. I receive, on the average, an inquiry a month concerning "astrolabes" people have found and in the last 20 years only two have been real, working astrolabes.
->I have no idea when or where yours was made. It probably came from a family of engravers who may have seen or had an astrolabe described to them, which they attempted to copy with no background on what an astrolabe is, how it works or how to design one. The ones I usually see were made in Pakistan, India or the area around Syria. It's had to tell the origin of most of them. I can't speak for Malaysia, but the Middle Eastern fakes were mostly made for the European tourist trade. Some were probably made for or by astrologers who wanted to have a complicated looking instrument to impress their clients.
->I don't have an opinion on its age, but the engraving looks quite sharp so it may not be very old.
->Compare it to some of the specimens on the web and you will immediately see it has no stars, no almucantars, no divided scales, etc.
->BTW, there are about 2,000 old astrolabes in various collections. I have not heard of a quality astrolabe of any origin being found in some time, although some interesting quadrants have turned up.
->What you have is not a working astrolabe, but a rather poorly executed fake. It cannot be used for any astrolabe function. Don't feel bad. I receive, on the average, an inquiry a month concerning "astrolabes" people have found and in the last 20 years only two have been real, working astrolabes.
->I have no idea when or where yours was made. It probably came from a family of engravers who may have seen or had an astrolabe described to them, which they attempted to copy with no background on what an astrolabe is, how it works or how to design one. The ones I usually see were made in Pakistan, India or the area around Syria. It's had to tell the origin of most of them. I can't speak for Malaysia, but the Middle Eastern fakes were mostly made for the European tourist trade. Some were probably made for or by astrologers who wanted to have a complicated looking instrument to impress their clients.
->I don't have an opinion on its age, but the engraving looks quite sharp so it may not be very old.
->Compare it to some of the specimens on the web and you will immediately see it has no stars, no almucantars, no divided scales, etc.
->BTW, there are about 2,000 old astrolabes in various collections. I have not heard of a quality astrolabe of any origin being found in some time, although some interesting quadrants have turned up.
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%center% %height=400px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|Note finer but similar conception in [[http://islam1o1.wordpress.com/2011/01/03/14-amazing-artefacts-of-the-aga-khan-museum-in-istanbul-turkey/|Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE]]
10 December 2011
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for tracking the movements of celestial bodies. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an astrolabe.
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The Astrolabe is an ancient device based on principles of stereographic known in Ancient Greece, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for tracking the movements of celestial bodies. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an astrolabe.
10 December 2011
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for tracking the movements of celestial bodies. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an Astrolabe.
According to David Juste, a historian at the University of Sydney with a focus on mediaeval astrolabes, there are some 900 astrolabes in museums around the world. TheAstrolabe in this collection still requires full identification including dating. Miniature in construction and probably designed for easy portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of theAstrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, or possibly a conical rod to act also as rule, screws not yet having been invented. (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
According to David Juste, a historian at the University of Sydney with a focus on mediaeval astrolabes, there are some 900 astrolabes in museums around the world. The
The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the
to:
The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for tracking the movements of celestial bodies. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an astrolabe.
According to David Juste, a historian at the University of Sydney with a focus on mediaeval astrolabes, there are some 900 astrolabes in museums around the world. The astrolabe in this collection still requires full identification including dating. Miniature in construction and probably designed for easy portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, or possibly a conical rod to act also as rule, screws not yet having been invented. (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
According to David Juste, a historian at the University of Sydney with a focus on mediaeval astrolabes, there are some 900 astrolabes in museums around the world. The astrolabe in this collection still requires full identification including dating. Miniature in construction and probably designed for easy portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, or possibly a conical rod to act also as rule, screws not yet having been invented. (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
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10 December 2011
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete, Adilade (Rule?) and Plates.
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete, Alidade (Rule?) and Plates.
10 December 2011
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an Astrolabe.
to:
The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for tracking the movements of celestial bodies. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an Astrolabe.
10 December 2011
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The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the Astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, screws not yet having been invented. (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
to:
The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the Astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, or possibly a conical rod to act also as rule, screws not yet having been invented. (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
10 December 2011
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off.
The
The
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off. Beyond this there some 100 possible operations that can be performed with an Astrolabe.
According to David Juste, a historian at the University of Sydney with a focus on mediaeval astrolabes, there are some 900 astrolabes in museums around the world. The Astrolabe in this collection still requires full identification including dating. Miniature in construction and probably designed for easy portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
According to David Juste, a historian at the University of Sydney with a focus on mediaeval astrolabes, there are some 900 astrolabes in museums around the world. The Astrolabe in this collection still requires full identification including dating. Miniature in construction and probably designed for easy portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
10 December 2011
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%center% %height=400px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|Note finer but similar conception in Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE
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%center% %height=400px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|Note finer but similar conception in [[http://islam1o1.wordpress.com/2011/01/03/14-amazing-artefacts-of-the-aga-khan-museum-in-istanbul-turkey/|Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE]]
10 December 2011
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%thumb% %center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|Note finer but similar conception in Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE
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%center% %height=400px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|Note finer but similar conception in Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE
10 December 2011
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%thumb% %center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|Note finer but similar conception in Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE
10 December 2011
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%height=400% %center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe1797-98CE.jpg|compares with Turkish Astrolabe by Hâjji Ali Qajar Isfahan 1797-8 CE
09 December 2011
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%center% %height=65px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals above run from 1 to 12 (hours?) anti-clockwise on the left hand side of the rete.
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%center% %height=65px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals above run from 1 to 12 (hours?) anti-clockwise on the left hand side of the rete.[^From http://www.omniglot.com/writing/malay.htm^]
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete, Adilade (Rule?) and Plates.
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete, Adilade (Rule?) and Plates.
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[^#^]
09 December 2011
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The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
to:
The Astrolabe in this collection still requires full identification including dating. Miniature in construction and probably designed for easy portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
09 December 2011
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%center% %height=65px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete,
probably representing the hours from 1 to 12.
probably representing the hours from 1 to 12
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%center% %height=65px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals above run from 1 to 12 (hours?) anti-clockwise on the left hand side of the rete.
09 December 2011
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%center% %height=75px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete, probably representing the hours from 1 to 12.
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%center% %height=65px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete,
probably representing the hours from 1 to 12.
probably representing the hours from 1 to 12.
09 December 2011
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09 December 2011
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%center% %height=50px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete, probably representing the hours from 1 to 12.
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%center% %height=75px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete, probably representing the hours from 1 to 12.
09 December 2011
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%centre% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete, probably representing the hours from 1 to 12.
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%center% %height=50px% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete, probably representing the hours from 1 to 12.
09 December 2011
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http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg
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%centre% http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg|Jawi numerals shown above can be seen running from 1 to 12 anti-clockwise on the left hand side of the rete, probably representing the hours from 1 to 12.
09 December 2011
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The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
to:
The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch and British influence, [[http://www.omniglot.com/writing/malay.htm|Jawi]] was phased out as widely used script in the C17 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
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http://meta-studies.net/pmwiki/uploads/Astrolabe/Jawi-numerals.jpg
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Note that the numbers 1 to 12 are scribed along the left hand half of the Mater ring from bottom to top.
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Note that this face is divided into 8 semi-quadrants. The first two characters in each semi-quadrant (reading from right to left, as does Jawi script) are ا لا Reading from right to left (as does Jawi script) these are the characters alif lam-alif which is Allah spelled phonetically.
09 December 2011
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Note that the numbers 1 to 12 are scribed along the left hand half of the Mater ring from bottom to top.
09 December 2011
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The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions.
to:
The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions. The fairly crude construction and artwork on this Astrolabe suggests that it is both intended for practical rather than ornamental use, and that it is fairly early in construction. The level of corrosion would be consistent also with this.
09 December 2011
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The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from ancient Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script.
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The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script. It is still maintained in a small number of religious and cultural institutions.
09 December 2011
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which as noted above, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off.
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The Astrolabe is an ancient device based on principles known in Ancient Rome, which, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off.
09 December 2011
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The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the Astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, screws not yet having been invented.
%center%meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg|Assembled Astrolabe: (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
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The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the Astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, screws not yet having been invented. (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg|Assembled Astrolabe: Is the indicator a rule (to go on the front face) or (more likely) an adilade (to go on the back face)?
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg|Assembled Astrolabe: Is the indicator a rule (to go on the front face) or (more likely) an adilade (to go on the back face)?
09 December 2011
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg|Assembled Astrolabe: Is the indicator a rule (to go on the front face) or (more likely) an adilade (to go on the back face)?
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg|Assembled Astrolabe: Is the indicator a rule (to go on the front face) or (more likely) an adilade (to go on the back face)? (See [[http://www.astrolabes.org/parts.htm|parts of an Astrolabe]].)
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete and Rule
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete, Adilade (Rule?) and Plates.
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%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg|Assembled Astrolabe: Is the indicator a rule (to go on the front face) or (more likely) an adilade (to go on the back face)?
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeMaterBack.jpg|Astrolabe Mater Back Face
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeMaterBack2.jpg|Astrolabe Mater Back Face
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeMaterFront.jpg|Astrolabe Mater Front Face
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabePlate1.jpg|Plate 1
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabePlate2.jpg|Plate 2
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabePlate3.jpg|Plate 3
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete and Rule
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeMaterBack.jpg|Astrolabe Mater Back Face
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeMaterBack2.jpg|Astrolabe Mater Back Face
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeMaterFront.jpg|Astrolabe Mater Front Face
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabePlate1.jpg|Plate 1
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabePlate2.jpg|Plate 2
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabePlate3.jpg|Plate 3
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/AstrolabeReteRule.jpg|Mater, Rete and Rule
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The Astrolabe was bought by a German antique dealer at a deceased estate auction and sold on the German ebay as a "Kalender, Rechenschieber??" (Calendar, Slide rule??). Note that the pin holding the rule in place over the rete and plate of the Astrolabe is not original. Some sort of wedge known as "the horse" would have been provided in the original, screws not yet having been invented.
09 December 2011
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Note that the pin holding the rule in place over the rete and plate of the Astrolabe is not original. A wedge known as "the horse" would have been provided in the original, screws not yet having been invented.
09 December 2011
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Whilst most devices in this collection are intended for generalised calculation of the four operations (addition, subtraction, multiplication and division), not all devices fall neatly into that category. This includes conversion devices which are effectively look-up tables. The Astrolabe included in this collection falls into this ambiguous category having characteristics of measuring device, look-up table, and slide-rule, with a digital output of time.
The Astrolabe is an ancient device based on principles known in Ancient Rome, which as noted above, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off.
The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from ancient Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script.
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg
The Astrolabe is an ancient device based on principles known in Ancient Rome, which as noted above, whilst not strictly a calculator, can be considered a circular look-up slide-rule type device for measuring the time. It has moveable parts which enable the trajectories of the known star constellations at a particular lattitude to be aligned with a particular constellation sighted at a particular elevation. From this the time can be read off.
The Astrolabe in this collection still requires full identification including dating. Miniature in construction and clearly designed for portability it appears to be enscribed in the Jarwi Islamic script from ancient Malaya. Under Dutch influence, Jarwi was phased out as widely used script in the C14 and replaced with an alphabetic script.
%center% http://meta-studies.net/pmwiki/uploads/Astrolabe/Astrolabe.jpg