[ 5 T 3 ] 
XXIX. Obfervations made in Savoy, in order to aj certain 
the height of Mountains by means of the Barometer ; 
being an Examination of Mr. De Luc’s Rules , deli- 
vered in his Recherches fur les Modifications de 1 ’At- 
mofphere. By Sir George Shuckburgh, Bart. F. R, S. 
Eead May 8 and 15, th e courfe of my tour into Italy in 
2 7 7 7» h 
“*■ the years 1775 an d 1776, I made 
fome ftay at Geneva; which being in the neighbour- 
hood of the Alps, and on that account a convenient 
home, induced me to make fome obfervations upon 
thofe mountains, which have been defervedly objects of 
attention to the molt incurious traveller. I was particu- 
larly defirous of verifying the experiments with the ba- 
rometer, in taking heights of different fituations; a 
method that has been long known to the ingenious, 
though but rarely praitifed, and capable of but little 
precifion till within thefe few years ; and perhaps at pre- 
fent not fo generally known as the convenience and 
utility of the method feems to require. I had provided 
myfelf with a confiderable collection of inftruments, or 
a kind of portable pbilofophical cabinet, which I had had 
Vol. LXVII. 
X x x 
made 
