*20 
THE VOYAGE OF H.M.S. CHALLENGER. 
Number of 
tuple. 
Rate of 
Collection. 
Deptli 8. 
Mgrms. of 
CO a per Litre. 
Remarks. 
276 
1873. 
Oct 4 
0 
43-2 
This water was shaken, as in No. 265, 
283 
6 
1000 
556 
with air, so as to establish equi- 
librium. 
333 
Dec. 29 
B 
59-5 
354 
„ 30 
0 
54-2 
355 
„ 30 
100 
56-9 
360 
„ 31 
0 
513 
364 
1874. 
Jan. 3 
0 
47-4 
369 
27 
0 
373 
371 
Feb. 3 
0 
44-7 
372 
>i 
0 
52-3 
376 
„ 9 
0 
47-6 
378 
,, 11 
1260 B 
67 9 
380 
,, 12 
0 
64-4 
382 
„ 13 
0 
65-6 
383 
14 
1675 B 
82-9 
The gases were boiled out of water, 
386 
„ 16 
0 
56-3 
and 225 c.c. of the remaining water 
barium chloride were treated as 
usual for carbonic acid ; therefore 
the carbonic acid in gas tube must 
be added to this. 
387 
„ 17 
0 
51-7 
389 
„ 18 
0 
48-5 
395 
„ 19 
B 
57-6 
396 
„ 20 
0 
48-7 
397 
21 
ii 
50 
70-6 
414 
Mur. 3 
1950 B 
44-3 
415 
»» 4 
0 
51-6 
417 
6 
0 
54 0 
419 
». " 
50 
68-3 
428 
„ io 
2150 B 
52-6 
439 
„ 13 
B 
53 7 
461 
June 17 
50 
53-3 
464 
„ 18 
5 
44 0 
466 
„ 19 
6 
61 *1 
471 
„ 20 
0 
49-8 
477 
„ 23 
B 
53-8 
489 
July 10 
50 
511 
497 
„ 13 
0 
59-4 
This result is probably false, as a sud- 
504 
„ 15 
0 
41-2 
den frothing over occurred which 
would introduce magnesia into 
the distillate, and so increase the 
apparent amount of carbonic acid. 
612 
„ 1« 
0 
36 1 
613 
23 
h « u 
0 
60-9 
629 
Aug. 15 
B 
459 
MO 
„ 17 
0 
96 0 
Very large amount of carbonic acid. 
639 
„ 20 
0 
31 -7 
The determination was quite satis- 
factory. 
6(3 
„ 21 
200 
4 4-4 
556 
24 
m * * 
11 
43 4 
537 
25 
II 
0 
35-6 
