MATHEMATICAL. esa PERS 163 
CMS Time. a,- 
At ;3*24' 13" Manidins. covered: * MA IM. 
.3 26 39 Plinius covered... < s 
3 31 9 in confa& with Mare Crifum. 
7-73 40 20 Grimaldus begins to emerge. eiad T 
73 53 54 emerfion of Manis. to imagi... wd 1g2de 
4 t£! 25 emerfion of Snellius et Furnerius. j 
4 55 20 eclipfe ends. 
4 57 5 day-light fo far advanced that the penumbra 
could no longer be perceived. ; 
On the 12th of April I was favoured with the company of 
the Reverend Mr. Prince, of Salem, and Mr. Brown Emerfon, 
of Reading, who obferved the eclipfe with me. Mr. Prince 
made ufe of a reflecting telefcope, the magnifying power not 
known, but fuppofed to be about.45. Mr. Emerfon obferved 
with a reflector, made by Mann, magnifying 34 times. 
The day was fine, and thedky unufually clear in the morning ; 
but before twelve o'clock the fun was frequently covered with 
detached flying clouds. Juft at the time the eclipfe began, 
however,the fun was free from any cloud and excellently defin- 
ed. Iwas fo fortunate as to have the point in the fun’s limb, 
where the contact took place, full in the field of view, and 
noted the. fecond that was called when I firft fufpected an im- 
preffion, though I was not certain of the contact for the fpace 
of two or three feconds after. Before the eclipfe ended, the 
wind breezed up frefh, and the vapour increafed fo as to occa- 
fion a conftant undulation of the fun’s limb. We were, there- 
fore, not fo certain about the time of the ending, as we were 
of the beginning of the eclipfe. 
m EE P W 2 Mr, 
