a ee 13 
But for reasons t explained in the course of this arti- 
er we will assume that _— air is igre — hundred times 
— than sea water, o > 0,00125 ; 1. 
This being granted: let us sup- 
= that a bell A B C, suspended by 
metallic chain, and full of atmos- 
streaie air, is plunged into the ocean; 
the air contained amt nett will be com- 
and ¢ comenamanale its sa:clensity, will be 
iniefeaned in proportion to the depth 
it penetrates. This condensation is 
here represented, at first by the line 
BC, at the moment of its immersion, 
-Gthen by the lines DE, FG, HI, &c. 
The following table will show the ratio of the condensation 
compared with the vole of the immersion 
Goemetrical Wei _Ammersion |Total pressure Tncrensingtion] 
‘ratio of of the of the air {sity of the air in’ 
: Soh in Seen 1 jth com-| 
Se inter yl to 32 fe feet of | expressed "ie toot of as 
Atmospheres. | sea water. water. of sea water. 
1 of 3 
2 sy 4 64 
4 32 128 
8 32 256 
16 32 512 
32 32 1,024 
64 32 2,048 
128 32 4,096 
256 32 8,192 
512)” 16,384 
1024 32 32,768 
From this table it appears that the point at which the 
density of the atmospheric air would be exactly equal to 1, 
or equal to the density of sea water, is to be found between, 
16,352 and 32,736 feet immersion in the sea. 
wish to determine by Eilculation. the. depth at which that. 
