REPORT ON THE SPECIFIC GRAVITY OF OCEAN WATER. 
7 
The hydrometer which we have described was designated No. 0, and the table was 
also designated No. 0. In the tabulated results the combination used is indicated in the 
column headed “ Number of Hydrometer.” Thus OOv means that hydrometer No. 0 table 
No. 0 and w T eight No. v were used. The combinations almost exclusively used were OOiv 
and OOv, which weighed 164‘2633 and 165*1198 grms. respectively. 
Suppose, for example, that when floating in a liquid. of 20° C., the hydrometer, loaded 
