PHYSICAL OCEANOGRAPHY OF THE GULF OF MAINE 
977 
for the densities will average less than ±0.04 units when the salinity has been deter 
mined by titration. In the case of hydrometer readings, the probable error of the 
densities will be about ±0.1 unit. 
All depths, whether originally recorded in meters or fathoms, are given in meters 
in these tables. Tables 1, 2, and 3 show the compression of sea water as condensed 
from Ekman’s (1910) tables 2, 4, and 5. 99 
Table 1 . — Correction of density for depth — water 0° and 23 in density ( sp . gr. 1.028 ) 
Depth, meters 
Increase 
in 
density 
Depth, meters 
Increase 
in 
density 
Depth, meters 
Increase 
in 
density 
Depth, meters 
Increase 
in 
density 
10 
0. 05 
80 
0. 38 
. 43 
200—. 
0.97 
700 
3. 35 
20 
. 10 
90 
250— 
1. 20 
800 
3. 83 
30 
. 14 
100 
. 48 
300... 
1. 42 
900 
4. 30 
40 
. 19 
120 
.57 
400. . 
1. 93 
1,000 
4.78 
50 ___ 
.24 
140... 
. 67 
500--. 
2. 40 
1, 100 
5. 25 
■60— 
.29 
160 
.76 
600 
2.88 
l' 200 
5. 72 
70 
.33 
180 
.87 
Table 2. — Additional corrections for compression at other temperatures 
Depth 
Add 
Subtract 
-1° 
1° 
2° 
3° 
4° 
5° 
6° 
7° 
8° 
9° 
10° 
ii° 
12° 
13° 
14° 
15° 
16° 
17° 
18° 
50 
0.01 
0.01 
0. 01 
0.01 
0. 01 
0.01 
0. 01 
0.01 
0.01 
0.01 
0.01 
0. 02 
0.02 
100 
0.01 
0.01 
.01 
.02 
.02 
.02 
.02 
.02 
.02 
.02 
.02 
.02 
.02 
.02 
.02 
200 
0.01 
0.01 
6. ol 
0.02 
.02 
.03 
.03 
.04 
.04 
.05 
.05 
.05 
.06 
.06 
.07 
.07 
.07 
.08 
.08 
300 
.01 
.01 
.02 
.02 
.03 
.04 
.05 
.06 
.06 
.07 
.08 
.08 
.09 
.09 
.10 
. 10 


400 
.01 
.01 
.02 
.03 
.04 
.05 
.06 
.07 
.08 
.09 
. 10 
. 11 
. 12 
. 12 
. 13 
. 14 
.01 
.01 
.03 
.04 
.05 
.07 
.08 
.09 
. 10 
. n 
. 12 
. 14 
. 15 
.15 
.16 



600 
.02 
.02 
.03 
.05 
.07 
.08 
. 10 
. 11 
. 12 
. 14 
. 15 
. 16 
. 16 
. 18 
700 
.02 
.02 
.04 
.06 
.08 
. 10 
. 11 
. 13 
. 14 
. 16 
. 17 
. 19 
. 20 
800 
.02 
.02 
.05 
.07 
.09 
. 11 
. 13 
. 15 
. 16 
. 18 
. 20 
000 
.03 
.03 
.05 
.07 
. 10 
. 12 
. 14 
. 16 
. 18 
.20 
. 22 
1,000 _____ 
.03 
.03 
.06 
.08 
.11 
. 13 
. 16 
. 18 
.20 
. 23 
.25 
1, 100 
.03 
.03 
.06 
.09 
. 12 
. 15 
. 17 
.20 
. 22 
1 j 200 
.03 
.03 
.07 
. 10 
. 13 
. 16 
. 19 
.22 
. 24 
Table 3. — Additional corrections for compression at other densities 
Density 
Depth 
Subtract 
Add 
22 
23 
24 
25 
26 
27 
29 
30 
100 
0.01 
0. 01 
200 
.01 
.01 
0. 01 
0. 01 
.02 
.02 
. 01 
.01 
0. 01 
0.01 
400 
.02 
.02 
.02 
.01 
.01 
.01 
500 - 
.03 
.02 
.02 
.02 
.01 
.01 
.04 
.03 
.03 
.02 
.01 
0. 01 
0.01 
.01 
.04 
.04 
.03 
.02 
.01 
.01 
.01 
.01 
800 — - 
.05 
.04 
.03 
.03 
.02 
.01 
.01 
.02 
900 
.06 
.05 
.04 
.03 
.02 
.01 
.01 
.02 
1,000 
.06 
.05 
.04 
.03 
.02 
.01 
.01 
.02 
1,100 
.07 
.06 
.05 
.04 
.02 
.01 
.01 
.02 
1, 200 - 
.08 
.06 
.05 
.04 
.03 
.01 
.01 
.03 
»» Condensation of the tables entails employing an average relationship between meters and decibars. Consequently, they 
are accurate only to ±2 in the last decimal place. This, however, falls within the accuracy of observation and will suffice for the 
c onstruction of all ordinary projections of density in water so shoal. 
