black and white areas
Iran
13th Century
Source: Sezgin, F. (ed.), Science and Technology in Islam, vol. 2, 2001.
Recipe Details
Preparation Steps
Black and white pigments are applied to the surface of a circular disc to create contrasting sectors. These sectors rotate behind a window to indicate lunar phases (p. 168).
Original Recipe Text
Black and white pigments are applied to the surface of a circular disc to create contrasting sectors. These sectors rotate behind a window to indicate lunar phases (p. 168).
Evidence
"The disc divided into black and white areas at the top of the back shows the daily waxing or waning of the Moon."
Remarks
The pigments serve a functional purpose on the 1221 AD calendar instrument, allowing the user to determine the lunar position and the elapsed portion of the month (p. 164, 168).
Scientific Analysis
Analytical Techniques
visual observation
Certainty Level
Inferred
Instrumentally Verified
Not Verified
Metadata
Material Type
pigment
ColorBlack
RegionIran
Approx. Year1250
Source Information
AuthorSezgin, F.
CollectionMechanical-astronomical calendar by Muhammad b. Abi Bakr al-Isfahani (No. 1221-22, CCL 5)
Language
N/A
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