264 Mr . Schroeter's Observation of 
more distant from the nearest of the former, and that all of 
them projected, if not 4, at least 3 seconds beyond the rim of 
the moon ; so that their height from the said rim could not be 
less than three-quarters of a German mile. It occurred to me 
that these probably were parts of the very high mountainous 
region Doerfel (v. Selen. Fragm. Tab. IV.); I delineated them, 
and compared them with my charts, and found that, though 
according to the present libration of the moon their projection 
ought not to be precisely as here represented, the coincidence 
was yet sufficiently striking. 
Soon after, when the south-western limb of the moon had 
advanced a little further on the disk of the sun, I discovered on 
this part another equally prominent mountainous range, which 
I also measured and delineated. It consisted of a ridge one 
minute and from 30 to 40 seconds, and therefore not less 
than 23 or 24 geographical miles, in length ; and four insu- 
lated mountains to the westward, all projecting from 2 to 3 
seconds beyond the rim of the moon ; these I had little doubt 
must be parts of the very lofty mountainous region Leibnitz, 
which a particular libration now presented in such a projec- 
tion to our sight. 
About noon, the eclipse being then at its greatest obscu- 
ration, I ventured to direct my excellent 13-feet reflector to 
the dim light of the sun ; and now the dark orb of the moon, 
and its lofty mountainous rim to the southward, appeared w ith 
such uncommon, and in a manner palpable distinctness, that 
the impression of it can never be effaced from my imagination, 
I at the same time distinguished between these high ridges, 
other less ones, which however were equally well define 
but which I had not perceived with the 7- feet reflector ; an 
