54 
Sir Benjamin Thompson's 
and equally round the bulb of the thermometer, I heated the 
thermometer in boiling water, as before described, and taking 
it out of the boiling water, plunged it into pounded ice and 
water, and observed the times of cooling. 
But as the interstices of these bodies thus placed in the globe 
were filled with air, I first made the experiment with air alone, 
and took the result of that experiment, as a standard by which 
to compare all the others ; the results of three experiments 
with air were as follows : 
The bulb of the thermometer 
surrounded by air. 
Heat lost. 
' Exp. No. l. 
Exp. No. 2. 
Heat 
acquired. 
Exp. No. 3. 
Time 
elapsed. 
Time 
elapsed. 
Time . 
elapsed. 
7°° 
■ 
M 
O 
O 

6o° 
3 s " 
38 " 
20 ° 
39" 
5 o° 
4 6 
46 
3°° 
43 
4°° 
59 
59 
4°° 
53 
3°° 
8 o 
79 
50 ° 
67 
20 ° 
122 
122 
6o° 
9 6 
10 ° 
23 I 
230 
70 ° 
175 
Total times. 
57 6 
574 
■ — ■ 
473 
