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Risālat al-ʿamal bi-al-ṣafīḥah al-āfāqiyyah — Or_5479 — Or

Title	Risālat al-ʿamal bi-al-ṣafīḥah al-āfāqiyyah — Or_5479 — Or
Author	Ali bin Issa Al-Astrlabi Al-Harrani
Author Original	علي بن عيسی الأسطرلابي الحرّاني
Publication Place	British Library -
Subject	None \| None \| None
Type	Document
Language	Arabic
Digital	Yes
Manuscript	Yes
Library:	Islamic Scientific Manuscripts Initiative (ISMI)
Record ID	184916
Library Location	British Library
Notes	None \| None
Sample Text	The first of that is knowing the inclination... If you want that and knowing the inclination, this is the plate. Turn the plate and look at the degree to which you want to incline. If there is less than a degree between it and the first degree of the load, then work with it, and if it increases over the y to a stop, then decrease it from a stop and work with what remains - knowing the risings of the signs in rectilinear astronomy if you want that... Then place the tip of that sign whose risings you want to know in straight astronomy on the diameter of the plate, whatever diameter you like, and mark the concentricity of the parts, then look at that sign to the end of that diameter, then Consider how much the Meri of the parts obtained from their position, and whatever it was, it is the rising of that sign by straight astronomy, knowing the risings of the signs by straight astronomy by the work of the south that is on the back of the plate.

View in source Islamic Scientific Manuscripts Initiative (ISMI)

Islamic Scientific Manuscripts Initiative (ISMI)

Risālat al-ʿamal bi-al-ṣafīḥah al-āfāqiyyah — Or_5479 — Or

Author Ali bin Issa Al-Astrlabi Al-Harrani

Author Original علي بن عيسی الأسطرلابي الحرّاني

Publication Place British Library -

Subject None | None | None

Type Document

Language Arabic

Digital Yes

Manuscript Yes

Library Islamic Scientific Manuscripts Initiative (ISMI)

Record ID 184916

Library Location British Library

Notes None | None

Sample Text The first of that is knowing the inclination... If you want that and knowing the inclination, this is the plate. Turn the plate and look at the degree to which you want to incline. If there is less than a degree between it and the first degree of the load, then work with it, and if it increases over the y to a stop, then decrease it from a stop and work with what remains - knowing the risings of the signs in rectilinear astronomy if you want that... Then place the tip of that sign whose risings you want to know in straight astronomy on the diameter of the plate, whatever diameter you like, and mark the concentricity of the parts, then look at that sign to the end of that diameter, then Consider how much the Meri of the parts obtained from their position, and whatever it was, it is the rising of that sign by straight astronomy, knowing the risings of the signs by straight astronomy by the work of the south that is on the back of the plate.