398 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
H. Tittman, of the U. S. Coast Survey, and adopted by both' the Coast Survey and! 
the Fish Commission, is — 0.00082, which is therefore to be subtracted from each| 
specific gravity determined by the above table and the result will be the specific^ 
gravity referred to a temperature of 4° C. as a standard. | 
ft 
Example: Station No. 1, at depth of 13 fathoms the reading of the salinometer was ! 
1.0248, and the temperature 61.9'^ F- 
i 
Tabular number for 61.9'^ 0. 0001345 ■ 
Dilference of temperature from 60° 1.9 
12105 '■ 
1345 
(. 00025555 ' 
•. 00082 
0. 00056 
1. 0248 
Keduced specific gravity 1. 02424 
I am indebted to the kindness of Professor Rockwood for the reduction of all the - 
specific-gravity records of this report 5 all other corrections or reductions are my own. 
Negretti and Zamira’s deep sea thermometers — corrections. [ 
[These instruments were com'pared with the standard instruments of the TJ. S. Signal Service in May 
and June, 1889, with the corrections noted, with the exception of No. 52728, which was compared 
with the standard instruments of the Fish Commission on December 4, 1884.] 
Correction to 60° F 
Correction from 60° F. to 4° C 
Total correction 
Observed specific gravity 
Number. 
32° 
42° 
52° 
62° 
72° 
Number. 
32° 
42° 
52° 
62° 
72° 
52728.... 
—.5 
^ 2 
—.3 
—.3 
—.2 
66661.... 
— . 1 
-.1 
—.2 
— .1 
—.1 
62365.... 
—.3 
— . 1 
.0 
+ .1 
.0 
66663.... 
—.4 
— . 1 
—.1 
-. 1 
—.1 
63911.... 
— . 1 
— . 4 
— . 1 
^ 
— . 3 
66661.... 
+.1 
—.1 
.0 
-.1 
^ 
63914... 
-i-.l 
+.1 
+.1 
.0 
.0 
66665 
. 0 
-.2 
— . 2 
—.3 
—.3 
63916 . . 
+.1 
+ .1 
+.1 
.0 
+.2 
66724... 
+.1 
+.1 
.0 
— . 1 
.0 
63918 
.0 
.0 
+.1 
.0 
+.1 
66726 
. 0 
— . 1 
—.2 
-. 1 
-f.l 
63919 ... 
H-.i 
.0 
.0 
.0 
.0 
66728 ... 
+.1 
. 0 
.0 
.0 
— .1 
63920.... 
.0 
—.2 
— . 1 
.0 
.0 
66729 ... 
. 0 
— . 1 
-.2 
— . 1 
— . 1 
63921 .... 
, 2 
—.3 
— . 1 
. 0 
+ .1 
66731.... 
— . 1 
-.1 
—.2 
— . 1 
, 0 
66656 
. 0 
— . 3 
^ 2 
— 1 
—.3 
66733.... 
.0 
.0 
— . 1 
—.1 
— . 1 
66658.... 
+.1 
, 2 
— . 2 
.0 
— . 3 
66734.... 
.0 
.0 
—.1 
— . 1 
— . 1 
66659.... 
.0 
—.3 
—.3 
— . 2 
— .1 
66737-... 
.0 
— . 1 
-.2 
.0 
.0 
66660.... 
.0 
—.4 
—.3 
— . 1 
.0 
Corrections for the set of meteorological instruments. 
Standard. 
1889. 
1890. 
1894. 
1895. 
1896. 
Solar. 
Mill. 
Max. 
Wet 
hull). 
Dry 
bulb. 
Air. 
Eadiat. 
32° 
. 0 
. 0 
.0 
.0 
.0 
.0 
.0 
52° 
—.1 
.0 
.0 
.0 
. 0 
.0 
+.5 
72° 
. 0 
.0 
— . 1 
-.1 
.0 
.0 
.0 
92° 
. 0 
.0 
.0 
.0 
.0 
.0 
-f.2 
The marine mercurial barometer which was used was tested on June 28, 1889, at 
the ISiew York Branch of the Hydrographic Office and found correct. 
The hydrometers used were carefully tested in the Physical Laboratory at Princeton 
by Professor Magie, and found correct, far within the limits of errors due to observation, 
and are thus regarded as giving correct data. 
