190 Ff. W. Clarke on Atomic volumes of Liquids. 
I have found no relation, however, between the higher atomic 
volumes of oxygen and sulphur, 
more group remains, that of tetratomic elements, Of 
these, carbon, as determined by Ko p, has the atomic volume 
11. For silicon I obtained the number 33:1, almost exactly 
three times 11. Altering this, as in the case of antimony, to 
agree with the altered atomic. volumes for chlorine, bromine, 
and iodine, we get 33°7, still near enough to 33 to be regarded 
as following the usual rule. d 
n the case of tin we meet the first and only obstacle to this 
Tule in the list of elements whose atomic volumes have beet 
determined. For this metal I obtained by means of the vapor 
volumes of ten of its compounds, the atomic volume 418 
Corrected for chlorine, bromine, and iodine, it stands 415, the 
nearest multiple of 11 to this being 44. Therefore either tin 
is an exception to the generality of cases, or else my dete! 
mination of its atomic volume is incorrect. 
For the chlorid of tin, the atomic volume found was 1314 
If we regard chlorine as possessing the atomic volume 22, then 
tin in this compound has the value 43-4. Also from the vapot 
volume of stanntrimethylethyl I obtained the number 440 a8 
the atomic volume of tin. Therefore it is not unlikely that 4 
more accurate investigation will decide the atomic volume 
this metal in its liquid compounds to be 44, but for the present 
t 
and the variations between his own earlier and later results for 
carbon, seem to render such alterations as I have made, me’ 
a 
