equal to that of cenanthic acid.’ The calculated atomic vor 
182 F. W. Clarke on Atomic volumes of Liquids, 
22:8, bromine 27°8, iodine 37:5. Oxygen, in the radical 122, 
out of the radical 78. Sulphur, out of the radical 22:6, in the | 
radical 28°6. Nitrogen, in compounds of the ammonia type23, | 
in hyponitric acid 8°6, and in cyanogen 17. Carbon 11, Be | 
sides these he also determined experimentally the atomic vol- 4 
umes of the following compounds, some of which are amended [- 
to suit the new atomic weights. - 
s I shall show hereafter, tin stands by itself, having an 
atomic volume different from either silicon or titanium. ore- 
over, the fact that the atomic weights of silicon and titanium — 
are nearer together than those of titanium and tin, goes t0 
ues that if titanium be classed with either, it should be with | 
con. 
As I previously stated, whenever two liquids have equal 
vapor volumes their atomic volumes also are equal, or neariy 80. 
or instance, the various isomeric ethers formed by the 
homologues of formic acid with the methyl series of hydrocat- 
bons, (ethyl acetate, formate, &c.,) have both equal atomic vol- 
ts and vapor volumes, and so on with all strictly isomer¢ — 
natures, benzol, butyronitrile, and bromid of ethylene, mee 
the vapor volume 257. Their atomic volumes. calculated by — 
Kopp’s method, are respectively 99, 99-5, and 99-6. Ico 
ci 
mon. a 
uppose now we wish to determine the atomic volume of any — 
element in its liquid compounds,—boron, for example. The — 
ber 258. Triethyl boron, C,H, ,B, has the vapor volume 157, 
