[ 231 ] 
XL Lranflation of a PaJJage in Ebn Younes; with fome 
Remarks thereon : in a Letter from the Rev. George 
Collat'd, M. A. Vicar of Twickenham, to the. Rev. Sa- 
muel Horfley, LL.D. Sec. R. S. 
REV. SIR, 
T wickenham^ 
Jan. 9, 1777. 
Read Feb. 13, T Ta V1N G, by means of the Royal Society, 
1 7 7 7- ff 1 
■* been favoured with a tranfcript of the 
•Arabic palfage in manufcript of ebn younes, in the 
library at Leyden, I now fend you as exa£t a translation 
of it as I can. I give it you in Latin, as the former 
..tranflations of it were in that language ; and as the num- 
bers in the manufcript by no means agree with calcula- 
tions made by modern tables, I have ventured to fup- 
pofe that they have been fomehow or other altered from 
what they were in the original tables of ebn younes. I 
have likewife ventured to fhppofe that the prefcnt Ley- 
hen copy is a tranfcript of another copy, which is no 
very violent ftippofition, confidering how long ago thefe 
obfervations have ibeen made, and how long it is face 
ebn younes wrote.. 
