174 Experiments made at the Polytechnic School . 
bibed by, or communicated to, any body whofe power of 
receiving and retaining heat is much lefs. . 
The capacity of water to receive and retain heat, or what 
has been called i its fpecific quantity of latent heat, has been 
found: to be to that of gold as 1000 to 50, or,as 20 to 15 
confequently, the heat which any given quantity of water 
lofes upon being frozen, were it tobe communicated to an 
equal weight of gold at the temperature of freezing, the 
gold, inftead of being heated 162 degrees, would be heated 
140 X 20= 2800 degrees, or would be railed to a brigh# rea 
heat. 
It appears therefore to be clearly proved, by my experi- 
ments, that a quantity of heat equal’to that which 4214 
grains (or about g? oz.) of gold would require to heat it from 
the temperature of freezing water to be red hot, has no fenfible 
effect upon a balance sip-Aaan of indicating fo fmall a varia- 
tion of weight as that of -~52>cs5 part of the body im quef- 
tion; and if the weight of gold is neither augmented nor 
leffened by one millionth part, upon being heated from the 
point of freezing water to that of a bright red beat, I think 
we may very fafely conclude, that ALL ATTEMPTS TO 
DISCOVER ANY EFFECT OF HEAT UPON THE APPA- 
RENT WEIGHTS OF BODIES WILL BE FRUITLESS. 
X. Extra& from the Report re[pedling Experiments made at 
the Polytechnic School in the Years V. and V1. on the Come 
bufiton of the Diamond. By C. Guyton. 
[Concluded from Page 61. ] 
Repetition of the Experiment in Fruétidor, Year FT, 
Averer examining what means were moft proper for pre- 
venting the veffels from cracking by the inequality of their 
ution it was found that there were none more certain 
than to employ, inftead of a glafs bell, a well-chofen globe 
of a moderate thicknefs, and of fuch a fize that its farkine 
‘might be at a fufheient diftance from the point of the lumis - 
mous cone. 
’ ~ The 
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