480 
DO. J. II. YIXCEXT OX THE DEXSITY AXD COEFFICTEXT 
Table Y. 
Experiment. 
I 
•) 
O 
O 
4 
^V eiglited meLii 
DcTisity of Ice at 0’ C. 
•916335 
•915460 
•916180 
l' •915540 
1^916060 
. . -9160 
Weiaiht Assigned, 
O O 
o 
O 
O 
o 
1 
o 
AVe tints obtain •OlOO gmmme per cub. ceiitim. as tlie density of the ice at 0^ C. 
Tins result depends upon the assinnption tliat the density of ice is a linear function 
ot tlie tent])eratttre on a mercurv-in-glass thermometer. Systematic error in the 
Fig 12. 
thermometer, so long as the zero is correct, is eliminated. The result likewise 
depends on the values assttmed for the density of water and of mercury at zero, but 
is independent of the absolute mass of the weights employed. 
TJic Coefficient of Cuhical Expansion of Ice. 
The errors of the theinionieter are, hoAvever, involyed in computing the coeHicient 
of cubical expansion wliich also depends upon the particular law of dilatation of 
