310 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
])lace to serve as a check on the table that is usually copied into the record book for 
daily nse at the sounding machine; it will also furnish a graphic method of detecting 
errors in the computation and application of corrections taken from the table. The 
following tigii'TS are taken from the original record of the measuring and transfer 
of 4,577 fathoms of wire from the commercial coil to the service reel of the Sigsbee 
sounding machine on board the Albatross, and demonstrates, through the regular 
increase in the column of differences, the remarkable accuracy attainable by an 
expert in guiding wire evenly upon the reel, besides furnishing complete data for the 
construction of correction curve or table. 
[Correction table, Navy steel reel, No. 2. Wire, No. 11 music.] 
Kuinber of turns on 
service reel. 
1 
Number of fathoms by 
measuring reel. 
-h 
a 
o 
5 
€3 
o 
^ s 
O.S 
> 
a 
s 
r=! 
a> ■ 
o ® 
o s 
X 4> 
£ 
Fathoms diff. + 
Number of turns ou 
service reel. 
Number of fathoms by 
measuring reel. 
Fathoms diff. + 
Number of turns on 
service reel. 
Number of fathoms by 
measuring reel. 
1 
“T 
T) 
o 
Ph 
50 
50 
0 
50 
1, 160 
10 
50 
2, 295 
45 
50 
3, 452 
102 
100 
100 
0 
1, 2110 
1, 211 
11 
2, 300 
2, 347 
47 
3, 400 
3, 505 
105 
50 
50 
0 
50 
1,262 
12 
50 
2, 399 
49 
50 
3, 558 
108 
200 
200 
0 
1. 300 
1, 313 
13 
2, 400 
2, 451 
51 
3, 500 
3, 611 
111 
50 
50 
0 
50 
1, 364 
14 
50 
2, 503 
53 
50 
3, 664 
114 
300 
301 
1 
1.400 
1,415 
15 
2, 500 
2, 555 
55 
3, 600 
3,717 
117 
50 
351 
1 
50 
1, 460 
16 
50 
2, 607 
57 
50 
3, 770 
120 
400 
401 
1 
1, 500 
1, 517 
17 
2, 600 
2, 659 
59 
3, 700 
3, 823 
123 
50 
451 
1 
50 
1, 568 
18 
50 
2, 711 
61 
50 
3, 876 
126 
500 
502 
2 
1, 600 
1, 619 
19 
2, 700 
2, 763 
63 
3, 800 
3, 929 
129 
50 
552 
2 
50 
1, 671 
21 
50 
2, 816 
66 
50 
3, 983 
133 
GOO 
602 
2 
1,700 
1,723 
23 
2, 800 
2, 869 
69 
3, 900 
4, 037 
137 
50 
652 
2 
50 
1, 775 
25 
50 
2, 922 
72 
50 
4, 091 
141 
700 
703 
3 
1,800 
1,827 
27 
2, 900 
2, 975 
75 
4, 000 
4, 145 
145 
50 
753 
3 
50 
1, 879 
29 
50 
3, 028 
78 
60 
4, 199 
149 
800 
804 
4 
1,900 
1,931 
31 
3, 000 
3, 081 
81 
4, 100 
4,253 
153 
50 
854 
4 
50 
1,983 
33 
50 
3, 134 
84 
50 
4, 307 
157 
900 
905 
5 
2, 000 
2, 035 
35 
3, 100 
3, 187 
87 
4, 200 
4, 361 
161 
50 
956 
6 
50 
2, 087 
37 
50 
3, 240 
90 
50 
4, 415 
105 
1,000 
1, 007 
7 
2, 100 
2, 139 
39 
3, 200 
3, 293 
93 
4,300 
4, 469 
169 
50 
1, 058 
8 
50 
2, 191 
41 
50 
3, 346 
96 
50 
4, 523 
173 
1, 100 
1, 109 
9 
2, 200 
2, 243 
43 
3, 300 
3, 399 
99 
4, 400 
4. 577 
177 
Splices occur at the following intervals, in fathoms: 100 295 630 880 1210 
1625 1970 2170 2475 2970 3275 3560 3670 3770 4230. 
Example: A sounding is made, the register reading 3,050 turns. What is the 
depth in fathoms? 
Number of turns on the reel 
Number of turns registered 
Turns remaining on reel . .. 
Correction for 3,050 turns . . 
Number of turns registereil 
Depth in fathoms 
4, 400 cor. + 177 
3, 050 
1, 350 cor. — 14 
+163 
3, 050 
3, 213 
