510 THE DEPTHS OF THE SEA. [CHAP. X. 
Disregarding the above series, a total of 134 experiments were 
made upon sea-water, which may be thus divided :— 
56 upon surface-water, 
18 ,, intermediate water, 
60 ,, bottom-water, 
134 
during the first and third cruises. 
The results are given in the quantity of oxygen in fractions 
of a gramme required to oxidize the organic matter in a litre of 
water. 
Average of 56 analyses of surface-water :— 
No. 
28. Decomposed. . . 0°00025 Total 0:00095. 
28. Decomposable . . 0°00070 
Maximum. Minimum. 
Decomposed. . . 0°00094 0°00000 4 cases. 
Decomposable . . 0°00100 | 000000 1 case, 
Motal = = = 0700194 0°00000 1 case. 
Average of 18 analyses of intermediate water :— 
No. 
9. Decomposed . . . 0°00005 Total 0:00039. 
9. Decomposable . . 0°00034 
In 7 out of 9 there was no “decomposed ” organic matter ; 
and in 3 out of 9 there was no organic matter at all, as indi- 
cated by this test. 
In this series the analyses of the observations made during 
the second cruise are not included, as the calculations have 
been differently made. am 
Average of 60 analyses of bottom-water :— 
No. 
26. Decomposed . . 0°00047) Total 0:00088. 
34. Decomposable . . 0-00041 J 
Maximum. Minimum. 
Decomposed. . . 0°00105 000000 2 cases. 
Decomposable . . 6°00148 | 000000 1 case. 
Total’... ; 0:00253 0:00000 | 1 ease. 
