REPORT OjST THE SPECIFIC GRAVITY OF OCEAN WATER. 13 
Tables of the Specific Gravity of Ocean Water. 
An * signifies that the sp. gr. of the water at the bottom was ascertained, and a t that the sp. gr. of the water at depths 
intermediate between the surface and the bottom was determined. 
I. The Surface Water of the North Atlantic. 
Number 
of 
Sample. 
Date. 
bp 
•H o . 
^5 - s 
O o 
ft 
Position. 
Depth in 
Fathoms 
from 
which 
Sample 
was 
obtained. 
Temperature 
(Centigrade) 
of Water. 
Hydrometer. 
Specific Gravity 
( Distilled Water at 4° 
C. - 1.) 
Latitude. 
Longi- 
tude. 
At the 
Depth 
D. 
During 
Observa- 
tion. 
Number 
of the 
Instru- 
ment. 
Reading 
Observed at 
t° C. 
Reduced to its Value at . 
15°-56 C. 
r C. 
D 
T 
t 
R 
St 
S 15-56 
St .' 
N. 
w. 
1873. 
0 
, 
O / 
o 
o 
*2 
Feb. 
15 
l 
27 
24 
16 55 
Surface. 
18-0 
18-5 
00 Y. 
44 
1-02658 
1-02730 
1-02671 
3 
16 
26 
40 
17 53 
9 9 
18'3 
17-8 
47 
1-02678 
1-02732 
1-02666 
*5 
17 
2 
25 
52 
19 22 
99 
18'9 
19-6 
42 
1-02639 
1-02739 
1 -02656 
6 
18 
3 
25 
45 
20 14 
9 9 
18-3 
19-6 
39 
1-02619 
1-02719 
1-02654 
7 
19 
4 
25 
28 
20 22 
18-9 
20-3 
35 
1-02601 
1-02720 
1-02637 
8 
20 
24 
56 
21 39 
19'4 
19-9 
38 
1-02619 
1-02727 
1-02633 
9 
21 
24 
22 
24 11 
19-4 
20-5 
40 
1-02629 
1-02753 
1-02659 
11 
22 
24 
15 
24 59 
19-4 
20-5 
39 
1-02626 
1-02750 
1-02656 
12 
23 
23 
22 
27 49 
20-0 
20-6 
41 
1 -02633 
1-02760 
1-02650 
14 
24 
23 
15 
30 56 
20-0 
207 
41 
1 -02633 
1-02763 
1-02653 
*17 
25 
8 
23 
12 
32 56 
19-4 
21-3 
40 
1 -02627 
1-02773 
1-02677 
*18 
26 
9 
23 
23 
35 11 
20-5 
21-9 
38 
1-02615 
1-02778 
1-02656 
20 
27 
23 
28 
36 43 
21-1 
22-0 
37 
1-02608 
1 -02773 
1-02635 
*22 
Mar. 
28 
10 
23 
10 
38 42 
217 
22-5 
35 
1-62595 
1-02774 
1-02617 
t*26 
1 
11 
22 
45 
40 37 
217 
22-4 
34 
1-02591 
1-02767 
1-02614 
28 
2 
22 
30 
42 6 
217 
22-5 
35 
1-02595 
1-02774 
1-02617 
+*31 
3 
12 
21 
57 
43 29 
22-8 
22'6 
32 
1-02579 
1-02761 
1-02575 
+*35 
4 
13 
21 
38 
44 39 
22-2 
22'8 
34 
1-02589 
1-02777 
1-02607 
37 
5 
14 
21 
1 
46 29 
23-3 
23-7 
26 
1-02543 
1-02756 
1-02553 
+*39 
6 
15 
20 
49 
48 45 
22-5 
23-3 
30 
1-02566 
1-02768 
1 02589 
+*47 
7 
16 
20 
39 
50 33 
23-3 
24-4 
25 
1-02536 
1-02770 
1-02568 
*48 
8 
17 
20 
7 
52 32 
23 '3 
24-2 
25 
1-02538 
1-02766 
1-02564 
*51 
10 
18 
19 
41 
55 13 
23-3 
24-4 
18 
1-02498 
1-02732 
1-02530 
•*52 
11 
19 
19 
15 
57 47 
23-9 
24-9 
15 
1 -02480 
1-02728 
1-02509 
*55 
12 
20 
18 
56 
59 35 
23-9 
24-7 
14 
1-02485 
1-02727 
1-02508 
+*61 
13 
•21 
18 
54 
61 28 
24-4 
25 1 
6 
1 -02431 
1-02685 
1-02451 
63 
14 
22 
18 
40 
62 56 
24-4 
25-8 
5 
1-02423 
1-0269S 
1-02464 
64 
99 
15 
236 
18 
28 
63 35 
91 
24-4 
25-4 
9 9 
6 
1-02430 
1-02693 
1-02459 
65 
25 
24a 
18 
43 
65 5 
24-4 
257 
6'5 
1 -02432 
1-02704 
1-02470 
*67 
26 
25 
19 
41 
65 7 
24-4 
25-2 
7 
1 -02435 
1 -02692 
1-02458 
*68 
27 
26 
21 
26 
65 16 
24-4 
25-4 
8 
1-02441 
1-02704 
1-02470 
*71 
28 
27 
22 
49 
65 19 
24-2 
25-2 
10 
1-02453 
1-02710 
1 -02484 
*73 
29 
28 
24 
39 
65 25 
23'9 
25-0 
11 
1-02459 
1-02710 
1-02491 
74 
30 
26 
38 
65 16 
23-3 
24'2 
19 
1-02504 
1-02732 
1 -02530 
+*75 
31 
29 
27 
49 
64 59 
22"2 
23-4 
24 
1 -02534 
1-02739 
1-02571 
*82 
April 
1 
30 
29 
5 
65 1 
22-2 
24 T 
20 
1-02510 
1-02735 
1-02568 
84 
2 
29 
51 
65 8 
21-4 
22 T 
29 
1-02564 
1-02732 
1-025S3 
87 
9 9 
3 
32a 
32 
1 
64 51 
20-0 
21-7 
99 
30 
1-02571 
1-02728 
1-02619 
88 
22 
356 
32 
26 
65 9 
20-0 
20-7 
32 
1-02585 
1-02715 
1 -02604 
89 
25 
38 
33 
3 
66 32 
21 T 
217 
29 
1-02566 
1 -02723 
1-025S3 
90 
26 
34 
11 
67 37 
18-6 
18-4 
40 
1-02635 
1-02704 
1 -02632 
91 
27 
39 
34 
3 
67 32 
18-3 
18-0 
41 
1 -02642 
1-02701 
1 -02636 
92 
28 
40 
34 
51 
68 30 
20'8 
1ST 
38 
1 -02637 
1 -02698 
1-02566 
93 
29 
41 
36 
5 
69 54 
18-3 
19-5 
35 
1 -02605 
1-02703 
1-02637 
*94 
30 
42 
35 
58 
70 35 
18-3 
17 '6 
43 
1-02647 
1 -02695 
1-02629 
96 
May 
1 
43 
36 
23 
71 46 
23-9 
22-8 
16 
1-02486 
1-02674 
1-02455 
97 
2 
44 
37 
25 
71 40 
13-6 
14-4 
25 
1 -02566 
1-02541 
1-02583 
98 
” 
3 
45 
38 
34 
72 10 
” 
97 
10'6 
9 9 
30 
1-02603 
1 "025*04 
1-02618 
(PHYS. CHEM. CHALL. EXP. PART II. — 1883.) E 3 
Bermuda to Now York. St. Thomas Island to Tenerifl'e to Sombrero Island, West Indies. 
Bermuda. 
