364 Sir george shuckburgh on the Variation 
Table of obfervation s of the boiling-point, made in a 
journey over the Alps. 
Place of ob- 
fervation. 
Height of 
the baro- 
meter. 
Heat of 
boiling 
water by 
obfervat. 
Heat of boil- 
ing water by 
Mr.DE luc’s 
thermometer 
DifF. 
Difference in 
of total. 
Inches. 
0 
0 
0 
Bologna, 
30.21 
213-5 
213-5 
— 0,0 
0 
Geneva, 
28.60 
210.4 
210.9 
-°,5 
-16 
Modane, 
26.61 
207.3 
207.4 
-0,1 
— 2 
Lannebourg, 
25-75 
205.1 
205.9 
-0,8 
- 9 
Mount Cenis, 
24.03 
201.2 
202.6 
“ l A 
- 1 1 
Ditto, 
23.9 1 
201. 1 
202-4 
- l >3 
— 10 
Mean 
_9 _L 
100 11 
The fecond column gives the height of the barometer 
at the time of obfervation ; the fourth, the heat of boil- 
ing water deduced from Mr. de luc’s rules, compared 
with the lowermoft obfervation, or that under the 
greateft preffure ; the fixth gives the difference between 
the theory and the experiment in the motion of the boil- 
ing point in hundredth parts of the whole fpace de- 
fcribed: from whence it might be concluded, that the 
motion or variation of the boiling point with a given va- 
riation in the preffure of the atmofphere was 7^5 or rr 
greater 
