[ a6 4 j 
refra&or. Thefe, as well as the fize of the cufps and 
the number of digits, were verified by Mr. de Fourcroy, 
chief engineer, who was fo good as to aflift us, and 
by Mr. Mouron, who afiified Mr. Blondeau in the 
obfervation of the annular eclipfe. 
There apppeared hardly any fign of an atmofphere, 
except againft the cufps of the fun, which feemed 
fomething bigger at the two fides, which touched the 
moon. There is no indication of one any where elfe, 
unlefs that the difk feems not fo well defined at the 
ingrefs and egrefs. Thefe two remarks would 
induce me to believe there is a fmall atmofphere j and 
this is the fubjedt of a feparate memoir. 
I faw very diftindtly with the refledtor of 4 feet 3 
inches (which anfwers a common telefcope of 70 or 
80 feet) and with the acromatic telefcope, feveral 
mountains, and particularly five, which I have deline- 
ated (fee Tab. XII), befides fome inequalities. I 
always faw them in their fixed places, whatever 
motion was given to the telefcope. 
N° 1. Emerged from the fun’s left limb or 
cufp at - 4 h 32' 6 " 
2. - - - - 4 35 18 
3. - - - 4 3 8 6 
Thefe feemed to have their fummits at about an 
equal difiance from one another. 
The mountain N°. 4. which was the highefi and 
well defined, made its exit at 4 h 45 o " ; it was ac- 
companied with a fmaller but well defined one a little 
on the left. On the right hand feveral inequalities 
remained} but the right limb of the moon had none, 
and was fmooth and perfectly well defined. 
6 We 
