A fi ll sail 381 
tated by carbonate of ammonia; several of the acids dissolve it 
without combination, for example, x Spartan monmmeN ey 4 
others change its nature, especially sulphuric and nitric. = 
— Ss amet 8 of sete deduced from four anslyvedy is 
eS P80 ; Atoms. ” calculation. cheese of Atom. 
(larbon;:°*~ » 60.247 xg 60.234 ea 
4.756 or FAD i ad s 
- 84,997 4 °35.023 © 
RDS TS io ot tae Bneye owt, 108, 
— iy 
“Ge Bfeer. ft the icheiniicandltlpliohtcnsceelbb instrument was. pe 
vented by M. Nosttt, (vide Am. Jour., Vol. xxu. p. 370,) and con- 
sists of a lectric pile, united toa galvanometer. M. Macep. 
Me tont has rendered it more sensible and more applicable to radi- 
ant heat by several improvements suggested by the inventor himself. 
Ina letter to Mr. P. Prevost, M. Meioni enumerates some interemtt 
ing effects exhibited by this instrument. 
- Calorific rare proceeding from iron heated to a dull or to a cherry 
: poly stopped by a stratum of water of two or three 
ness. It is the same with heat from the flame of 
alcoho phur. . When the heat of the iron surpasses the above, 
some a to pass through, and the quantity increases to white 
eat, conformably to the law which Larocue found for glass. The 
eieinitity of heat transmitted varies also when issuing from the flames 
of oil, tallow, wax, wood, resin. The greatest effect seems to be 
pened by an argand lamp, and by the solar rays. 
A singular result is the following, which clearly proves the exists 
ence of two very distinct qualities in calorific rays. A thermometer 
is placed on the front surface of a layer of water, and a thermo-mul- 
tiplicator, behind the same layer. An iron ball at a dull red heat is 
“brought near—the thermometer rises from 60 to 90°, and the ther- 
ltiplicator remains unmoved. A double’ argand lamp is then 
placed at the distance of a few feet : the th ir does not move 
while the thermo-multiplicator shows a deviation of 36°. 
“The rays from the former source, although endowed with great 
energy, a are wanting it in a that quality which those from the latter source 
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