286 Sir Benjamin Thompson’s 
(Exp. 1 
Thermometer N° 1 . 
Its bulb half an inch in dia- 
meter (hut up in the center of 
a glafs globe 1 \ inch in dia- 
meter, voided of air y and her- 
metically fealed. 
T aken out of freezing water , 
md plunged into boiling water . 
(Exp. N° 14.) 
The fame Thermometer (N° 1 .) 
The glafs globe, containing 
the bulb of the thermometer, 
being now filled with air i and 
hermetically fealed. 
Taken out of freezing water , 
and plunged into boiling water . 
Time elapfed. Heat acquired. 
Time elapfed. 
Heat acquired. 
M. S. 
M. S. 
vj 
0 
0 55 10 
O 32 
10 
0 55 20 
O 32 
20 
1 7 30 
0 43 
3° 
1 15 40 
0 50 
40 
1 29 50 
1 r 
5° 
22 60 
1 24 
60 
3 21 7° 
2 38 
70 
13 44 80 
10 25 
80 
24 48 “ total time of 
18 5 = 
total time of 
heating from o° to 8o°. 
heating from o° 
to 8o°. 
Total time from o° to 70° = 
Total time from o° to 70° = 
if 4". 
7' 40". 
It appears, therefore, from thefe experiments, that the con- 
cluding power of common atmofpheric air is to that of the 
Torricellian vacuum as 7 44- t0 11 -r* inverfely, or as iooo to 
602 ; which differs but very little from the refult of all the 
foregoing experiments. 
Notwithftanding that it appeared, from the refult of thefe 
laft experiments, that any difference there might poffibly 
have been in the proportions or dimenfions of the inftruments 
N° z. and N° 2. could hardly have produced any fenfible error 
in 
