CARBON DIOXIDE OF THE OCEAN 609 
loss of CO, from the water and no more gain in the air above 
the water. The carbon dioxide remaining in the water was thus 
determined, and the degree of the bicarbonate dissociation cal- 
culated. This was repeated for various temperatures. 
The table is as follows :* 
t N Pure Air Ordinary Air 
(n.) (n r) 
2 200 1.90 
2 200 2.04 
2 52 2.06 
fe) 200 1.70 
13 50 : 1.84 
15 100 1.63 
15 200 1.50 
20 200 1.42 
25 53 1.53 
32 52 1.33 
32 52 1.89 
32 150 In6¢ 
equals temperature. N-number of times air was renewed 
until loss of CO, from water ceased. n,=ratio of first to the 
second equivalent of CO, in bicarbonate when shaken in air 
free from CO,, where 2.00 represents fully saturated bicarbonate 
and 1.00 simply the normal carbonate. n,=the same for ordi- 
nary air. 
These experimental data do not permit the drawing of any 
very accurate conclusions. Professor Ditmar states that these 
are only preliminary, and has promised us a completion of this 
work, which we await with impatience. However, we must 
needs use what we have, and referring to curve 5, we see that 
at 15° the ocean will contain about 83 per cent. of the total 
second equivalent of CO,,and at 10°, about 88 per cent. of it, 
or an increase of 5 per cent. of the second equivalent which is 
represented by the line a—é in figure. For pure air artificially 
freed of CO, at 10° the dissociation goes through 70 per cent. 
but Professor Arrhenius does not postulate a complete removal 
Enyce. Brit., Vol. X XI, p. 612. 
