Sir Benjamin Thompson’s 
The bulb of the thermometer placed in the 
center of the glafs ball, and 
furrounded by a 
Torricellian vacuum. 
furrounded by air. 
(Exp; N 
0 1.) 
(Exp. N‘ 
3 2 .) 
Time 
Heat 
Time 
Heat 
' 
elapfed. acquired. 
elapfed, a 
cquired. 
Upon being plunged into 
l « 
O 
OO 
18 0 
boiling water 
f 
M. S. 
O 
M. S. 
• 
After remaining in it 
I 30 
27 
0 45 
27 
— — 
1 0 
3°-A- 
4 0 
44tV 
2 10 
44tV 
5 0 
48-1-0* 
2 40 
48 t V 
— 
4 0 
5 ^% 
— - 
5 0 
Thefe experiments were made at Manheim, upon the firft 
day of July laft, in the prefence of Profeffor Hemmer, of 
the Ele&oral Academy of Sciences of Manheim, and Charles 
Art aria, Meteorological Inftrument-maker to the Academy, 
by whom I was a flirted. 
Finding the conftrutrtion of the inftrument made ufe of in 
thefe experiments attended with much trouble and rifque, on 
account of the difficulty of foldering the glafs ball to the tube 
of the thermometer without at the fame time either doling up, 
or otherwife injuring, the bore of the tube, I had recourfe to 
another contrivance much more commodious, and much eafier 
in the execution. 
At the end of a glafs tube or cylinder ten or eleven inches in 
length, and near three-quarters of an- inch in diameter inter- 
nally, I caufed a hollow globe to be blown i § inch in dia- 
meter. 
