in order to af certain the height of Mountains. 5 S S 
The Mole is a convenient, infulated mountain, 
fituated about eighteen miles eaft of Geneva, and riling 
near five thoufand feet above the lake, much higher 
than any body, that I know of, has ever made thefe ex- 
periments at, with the required precifion. On this fum- 
mit I determined to confirm or cor re 61 my difcovery, and 
communicated my intentions to Mr. de saussure, a very 
ingenious gentleman of this place, and well fkilled in 
various parts of natural and experimental philofophy, 
who gave me all the information neceffary, and obligingly 
promifed to accompany me, as did alfo Mr. trembley, 
afliftant to Mr. mallet, well known in the aftronomical 
world. This expedition was undertaken in the latter end 
of Auguft and beginning of September. I lhall here 
beg leave to fet the reader down at the bottom of the 
mountain, and flatter myfelf he will accompany me to 
the top. It was about five in the afternoon when we left 
St. Joire, a wretched little village at the foot of the moun- 
tain to the eaft, and where we had dined in a moft mi- 
ferable auberge , preparing to afcend the fummit on foot, 
being feven or eight in company, including guides and 
fervants, who carried my inftruments, provifions, &c. ; 
the former confifting of the equatorial, the barometer, 
different thermometers, ele6trical balls, an hygrometer, 
and a dipping-needle; together with another barometer 
of- 
