m6 © ASTRONOMICAL ann 
IX... Obfervations of a Solar Eclipfe, Otfober. 27, 1780; made 
at the Univerfity in Cambridge. Communicated by CALEB 
GANNETT, 4. M. Rec. Sec. Amer. Acad. ! 
N feveral days previous to the eclipfe, I carefully took 
correfponding altitudes of the fun, with an excellent 
Hadley’s quadrant. The agreement between the obfervations 
was fuch, that thofe taken on the two immediately preceding 
days, expres the refult of the whole, They were as follow : 
O&. 25, A.M. P.M. 
8hg9g'19" — 2hgo* A ees at app. noon the clock was 115 54/ 4o” 
8 $0. I nterval $ 57 
2 $31 49 
8 52 10 a3 $7 ;8 * ditto 2 58 K 
—— ——— Ëquation of + intervals T 
Sum,26 47 30 8 40 30 PRONS 
e ees 11 54 56 
Mean,8 55 50 2 $3 30 nope 
Clock flow of fun, £4 
O&. 26, A. M. P. M. 
848 1 3 1:18 Hence, at app noon the clock was 11 54 36 
Interval 
8 52 11 347.) nt £346:8364 
8 56:47 25223 ditto, 253 4 18 
9 o 58 2 48 11 Equation of I interval 4 16 
9 442. .2 44 29 —— 
———— — —— iI 54 52 
Sum,44 42 39 I4 23 22 PREE Se 
——— _ —— Clock flow of fun, ^ $5:8 
Mean,8 56 31 48” 2 $2 40 24” 
On the 27th, obfervations were taken in the morning ; but 
the atmofphere was fo loaded with vapour, as to prevent the 
taking of any, with accuracy, in the afternoon. 
From the above obíervations it appears, that between the 
25th and 26th of October, the clock gained on mean time 2”. 
Hence, on the 27th, at apparent noon, the clock was flow of 
the fun § 11", Two common brah reflecting telefcopes were | 
ufed upon the occafion, each magnifying about 60 times ; alfo, 
an 
