in order to af certain the height of Mountains . 539 
While at the top of the Mole, I was very fenfible of 
the cold, there being a brilk wind, which, though, fouth, 
came over the mountains of ice, and was very keen; 
infomuch that, about two hours after I had been there, 
I nearly loft the ufe of my fingers, and found my lips 
much affected and parched from the tranfition, having 
been a good deal heated in afcending with two waiftcoats 
and a great coat on. The thermometer, however, when 
I firft mounted, flood no lower than 48°. I muft here 
afk pardon for this long digreflion, which I have ven- 
tured to tranfcribe from my journal written upon the 
fpot. 
To return then to the obfervations. After what has 
been faid refpeiting thofe on Mont Saleve, it will l'uffice 
here to mention, that by repeated meafurements I de- 
termined the horizontal length of the bafe 1 , 2 (fee the 
chart) to be = 1 2 5 o ft. 3.9 inch; the L. at 1 = 95° 37'28 ;/ ; 
z. at 2 = 7 7 0 48' 53"; and the z. at 3 = 6° 33' 49'''. The 
mean corrected angle of elevation of 3 from 1 
= 2i° 29' 34"; ditto of 3 from 2-21 0 3' 41"; and laftly, 
the elevation of 2 from i=o° 47' 24". 
4 A 2 
Thefe 
