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3- Becaufe this elevation of the fun again ft the 
cufps l'eemed to me a little higher than the mountain 
N°. 4. which jetted out the moft on a fide view. 
4. Becaufe the penumbra, which I obferved at the 
ingrefs and egrefs, and which certainly is much lefs 
defined than towards the middle, is very probably 
occafioned by the mixture of the rays, which are 
refratfted in palling through the lunar atmofphere. 
This appears to me more likely than that it fhould be 
taufed by the inflexion of the light, from the globe of 
the moon; becaufe fuch infledded light Aiding upon 
the globe ought rather to ltflen its dark limb; whereas, 
on the contrary, the penumbra, which was fufliciently 
thick, ferved, as we all oblervcd, toinlarge that limb. 
That the telefcope was clear, appeared from the 
fpots of the fun appearing exactly defined. A parcel 
of thele was feen lomewhat below the middle on the 
right, and above it on the left. 
' The Mountains. 
The moft furpriiing circumftance to me, as 
I obferved to the gentlemen prelent, and made a 
fketch of, after half an hour’s continual attention, was 
that of the mountains feen in profile, and perfectly 
well defined ; N°. 4. in particular with the imall ele- 
vation on the left, had feveral inequalities and protu- 
berances, which I have drawn exactly enough, though 
with a pencil not fufliciently (harp ; i could have been 
more correct as to particulars, had I had a drawing 
pen*. 
* Mr. Short told me in the month of Ji.l/ 176.6, in London, 
th.it he had had a fide view of theft mountains wall Ins uldcopes 
of 8 and 12 feet. 
The 
