( 30 ® ) 
confirmed thereby, at lead in the Opinion of the 
R. Pere> 
I have aflumed the Latitude to which Hipparchus 
might have adapted his Calculations, to be '36 De- 
grees ,* becaufe I find in Page 14. of the aforefaid Edi- 
tion that he makes the longeft Tropical Day 14 b. 
30^: And in Page 29, he tells us, that the Southern 
Star in the left Foot of Bootes {pBayero') having 27® 
20^ North Declination, was above the Horizon, 14 b. 
57' ; whence it follows, that the Latitude muft be 
36® 5'. He alfo tells us, in the fame Page 29, that 
this Star fet when 22^ of Capricorn culminated, and 
6® of Taurus afcended; repeating the fame thing in Pag. 
3 9, which leaves no room to fufped: that thofe Numbers 
are not the fame that Hipparchus had computed- 
I therefore thought it worth while to enquire in 
what Latitude 6 Degrees of Taurus rifes when 22 
Degrees of Capricorn is on the Meridian; and with 
the Obliquity of the Ecliptick, as now we have it, 
the Latitude refulting is 3 5 ° i North ; but with the 
Obliquity allowed by Hipparchus^ it will be found 
lefs than 35®. 
This 1 fay, only to obviate any Objedlion that 
may be made by P. Souciet to the aforegoing Ar- 
gument ,* tho’ if he pleafe to examine it, he will 
find that an Error of a Degree in the afTumed 
Latitude, will by no means invalidate the Proof 
here given that this Firfl Star of Aries could be no 
other than the middle Star in Lino Boreo Pifciunh 
marked w by Bayer. 
III. An 
