Astrolabe plate report (inventory number 35313)

Date	ca. 1700
Maker	Khalīl Muḥammad ibn Ḥasan ‘Alī
Place	Iṣfahān
Material	Brass
Inventory no.	35313
Acquisition	Presented by J. A. Billmeir in 1957

There are 7 plates with latitudes ranging from 11°0' to 40°0' .

Inscribed:

Transcription	Translation	Type
عرض يا	Latitude 11	Latitude
ساعاته يب يح	Hours 12h18m	Hours of daylight
المشرق	East	Date
المغرب	West	Date

Inscribed:

Transcription	Translation	Type
عرض كط	Latitude 29	Latitude
ساعاته يج نب	Hours 13h52m	Hours of daylight
المشرق	East	Date
المغرب	West	Date

Inscribed:

Transcription	Translation	Notes	Type
عرض يط	Latitude 19		Latitude
ساعاته	Hours		Hours of daylight

This tympan is labeled with a latitude of 30°. By inspection, however, it is clearly constructed for a latitude closer to 27°. Inscribed:

Transcription	Translation	Type
عرض ل	Latitude 30	Latitude
ساعاته يج نز	Hours 13h57m	Hours of daylight
المشرق	East	Direction
المغرب	West	Direction

Inscribed:

Transcription	Translation	Type
عرض كب	Latitude 22	Latitude
ساعاته يج كا	Hours 13h21m	Hours of daylight
المشرق	East	Direction
المغرب	West	Direction

Inscribed:

Transcription	Translation	Type
عرض ل	Latitude 30	Latitude
ساعاته يج نز	Hours 13h57m	Hours of daylight
المشرق	East	Direction
المغرب	West	Direction

Inscribed:

Transcription	Translation	Notes	Type
عرض كز	Latitude 27		Latitude
ساعاته لد	Hours 34	There must be some mistake in this, for at latitude 27°, the longest day will be only ca. 13h45m..	Hours of daylight
المشرق	East		Direction
المغرب	West		Direction

Inscribed:

Transcription	Translation	Type
عرض م	Latitude 40	Latitude
ساعاته يد نب	Hours 14h52m	Hours of daylight
المشرق	East	Direction
المغرب	West	Direction

Inscribed:

Transcription	Translation	Notes	Type
عرض لب	Latitude 32		Latitude
ساعاته يد يز	Hours 14h17m	This value is unusual. The expected lenght of daylight is 14h7m or 14h8m..	Hours of daylight
المشرق	East		Direction
المغرب	West		Direction