[ I 6 + ] 
related in the Prolegomena to Tycho Brahe’s Hijloria 
Coelejlis , p. 34; nor any between thole of Alba- 
tegnius and Ptolemy , befides the Eclipfe of the Sun 
obferved by Theon at Alexandria ; notwithstanding 
I carefully fearched all the Remains of Antiquity I 
could find with that View. Thefe Eclipfes of the 
Sun are the more valuable, becaufe they were ob- 
ferved in Places the Longitudes and Latitudes whereof 
are determined by Monficur Chazelles of the Royal 
Academy of Sciences, who was fent by the French 
King in the Year 1693, with proper Inftrumcnts for 
that Purpofe. T)u Hamel Hift. Acad.p. 305), 3 95. 
The l'olar Eclipfe obferved by Theon was in the 
1 1 2th Year of Nabonafj'ar the Day oiThoth, accord- 
ing to the Egyptians , but the 2 2d Day of Tauni , 
according to the Alexandrians: He carefully ob- 
ferved the Beginning of 2 temporal Hours and yo' 
Afternoon, and the End at 44 Hours nearly After- 
noon at Alexandria. Theonis Comment, in Ttol. 
mag. ConflruEt. p. 332. This Eclipfe was June 16, 
in the Year of Chrirt 364: And the temporal Hour 
at Alexandria being at that time to the equinoctial 
Hour as 7 to 6, makes the Beginning at 3 equinoctial 
Hours and 1 8' Afternoon, and the End at 5 equinoctial 
Hours 15' nearly. 
The Eclipfes obferved at Grand Cairo were as 
follows. 
“ AnnoHegirx 367, die Jovts, qui erat 28, rabic 
tc poftcrioris (is eft ordine menfis quartus, et incipit 
“ ille annus Saracenicas die 15) Augufli , anno Chri- 
“ ftiano 977) obfervatum fuit Cahirre \n<^/Egypti 
“ metropoli initium eclipfis Polaris, cumaltitudo lolis 
“ diet 
