332 Scientific Intelligence. 
es to be considered. Regnault showed that the specific heat 
other elements, being 6°6 at _constant volume instead of 4°8. 
traction of one-third in volume, as a 
carbon dioxide. The data were obtained combining ive: ine 
and By ewee in presence of an excess of one or the er of 
these gases; from which it appeared that the weight Pe Cl 
sensibly reat to that of H,. The mean specific heat of chlorine 
that of hydrogen; the latter being 5°1 and the for mer 15°3 nearly, 
Chlorine comports itself toward oxygen as ozone would do if it 
were stable and were formed fhe the evolution of hee a 
Chem. Phys, VI, iv, 66, Jan. 
2. On the Specific Heat oe Water and of Carbon diovide be 
High Temperatures. —In a second paper, Brerrnetor and VIE 
have given the results of jaiteil sa Aiton ee determine “the 
with nitrogen; in the latter case the specific heat of the nitrogen 
was subtracted. The following table gives the data and the 
calculated values obtained: 
mol. spec. 
egies eck Heat rat 0, HO be- 
Mixture. 1. = a Tu N.. tween of nd T°. 
H.+0 3240° in er 18.12 
H,.+0+4N 2860 20°52 1°69 18°83 
H,+O0+N, 2548 23-08 6°26 16°82 
H,s+0+2N, 2180 26°93 11°36 15°57 
igual hen 7 : 32-05 15°21 16.84 
25°09 7°20 17°89 
Hin w ose. sd 30°60 12°70 17.90 
The value given in the fifth experiment is not regarded as sti 
as the others, since the large amount of inert gas present ¢ 
the combustion to be twelve times as ou: It will be pre 
that here also the specific heat increases with the temperature 
‘The authors represent this ie by the empirical formula: 
C= 162 + 0°0019(T—2000) 
of the latter at 2000° by 7:0 and at 4000° 
represents a double work, first that of the Pelion disaggregt — 
ion of the compound as, and second that of its chemical di es 
ciation. The values obtained for carbon dioxide are given 4§ 
follows: 
