Chemistry and Physics. 2138 
oc he 
formation of the same volume of nitrogen monoxide or of chlorine 
monoxide, in both of which the value is —18. It is two-thirds of 
that given in the formation of nitrogen dioxide —43°3, In the 
three cases of direct synthesis of compound gases under the influ- 
ence of electricity, the author finds :— 
0,+0,=(0,), (4 volumes) —29°6 cal. (spark or silent discharge), 
N,+0,=N,0, (4 volumes)—24°3 cal. (spark), 
C,+H,=(C.H,), (4 volumes) —64- cal. (electric arc),— 
an obvious proof of the function of electricity in chemical synthe- 
sis. Ozone therefore is a body in whose formation heat is ab- 
sorbed, and the activity of which is due to this heat, which is 
again set free when it combines. It is thus a magazine of energy 
stored up under the influence of electricity. This is notable when 
It is remembered that it is condensed ox en; condensation 
generally setting free heat.— C. R., Ixxxii, 1281, June, 1876. 
2. On Eh 
culty of freeing stibine from hydrogen, and to the fact that it 
Spontaneously decomposes even at ordinary temperatures, its exact 
iti ver i examin 
0 P 
der, Chancing to observe the ready action of the gas on sulphur, 
according to the reaction 
(SbH,), +S,—=Sb,S,+ (H,S), 
the author made use of the fact in order to analyze it. The dry 
848 Was passed through weighed U-tubes containing sulphur, then 
through a calcium chloride tube, and then through a strong solu- 
tion of copper acetate. The apparatus being placed in sunlight 
Phide (SbH,), +(H,S).— . By screening the empt 
scene of ae (H,8),=Sb.8,+(Hz),- By 8 in id 
Sened; and by allowing for it, the amount of hydrogen combined 
22 parts (one atom) of antimony was found to be in two 
ceeriments, 3°34 and 3°13 respectively; whence the author con- 
4 udes upon SbH, as the correct formula of stibine. He foun 
- reaction of this gas on sulphur so delicate a test for the pres- 
pets of light that he made some photometric and sap ae 
- Soc., elxi, 641, May, 1876. 
f 
Cl Ss : 
Colum inm and tantalum in carbon crucibles. A mixture of 
M. JOUR. 8-1 Tarp Series—Vot. XII, No. 69.—Sxpr., 1876, 
14 
