118 Analysis,.g-c. of Cordier’s Essay upon the 
the superincumbent column. Would not this account for. 
much of the caloric extricated at great depths? 
“ On the conclusions deducible from the preceding experiments. 
“1. The earth possesses within itself a source of heat, not de- 
pendant on the rays of the sun: A heat which increases rapidly 
as we descend deeper. 
“2. The law of this increase of heat is not the same every 
where. It may be double or triple at one place, what it is at 
another. 
** 3. Nor do these differences depend on latitude or longitude. 
“4. The increase of temperature is more rapid than was sus- 
“¢1. All the phenomena agree with the mathematical theory 
of heat ; and with a high temperature belonging to the earth it- 
t 
earth is ten thousand times greater than the liquids, the original 
liquidity of our globe must have been owing to caloric, and not 
o water. 
© 2. Suppose an increase of one degree for each twenty-five 
leagues at Decise 
1-55 of the mean radius of our planet. ari 
“4. It is probable, therefore, that our earth is a star partially 
cooled, as Des Cartes and Leibnitz thought: and that the centre 
li preserves its original fluidity. 
 §. Ifwe consider on one hand the generality which the ob- 
servations of Dolomiew on the situation of the eruptive fires, 
(Rapports sur ses voy s Journ. des Mines, tom. 7, p. 385,) a 
our own (Cordier’s) €xperiments on the composition of lavas, 
rises to one hundred degrees of 
