EQUIPMENT. 13 
again and not detached; the speed of the reel was not quite so 
rapid, as will be seen on making a comparison of the following 
records, the one showing a sounding with a thirty-four pound 
lead, the other with a cannon-ball detached on striking bottom. 
U. S. Coast Survey Steamer “ Blake.’ Locality, twenty miles N. W. of Sombrero Tsland. 
Date, April 23, 1879. Sounding, No. 25. Line PP. Sinker used, shot; weight, 
60 ibs. Steel wire used, 0.028” in diameter; weighs 14.5 lbs. to the nautical mile ; 
Turns of Reel Reeling out. Reeling in. 
as per DOR c эйт т д 
Register. Times, Intervals. Times. Intervals. 
H. M. 8. M. 8. H. M. 8. М. 8. 
000 11 21 32 00 12 30 20 55 
100 92 34 1 4 29 35 47 
200 25.96 51 28 38 47 
300 24 15 50 27 51 49 
400 25 6 5 M 2 54 
500 25 58 52 26 8 54 
600 26 52 54 25 14 59 
700 27 46 54. 24 15 El 
800 28 43 57 23 14 1 4 
900 29 43 1 00 22 10 Шу 
1000 30 41 58 el 7 dj i 
1100 31 43 LL - 20 00 1 10 
1200 32 46 1 3 18 50 1 10 
1300 33 48 d 17 40 1 13 
1400 34 54 1 6 16 97 1 18 
1500 36 1 ыт 15 9 1 18 
1600 Ol 9 1 8 13 51 1 21 
1700 38 15 1 6 12 30 1 23 
1800 39 26 111 ШТ 1 24 
1900 40 35 1 9 9 43 1 25 
2000 41 48 1 13 8 18 1-25 
2100 48 2 114 6 5 187 
2200 44. 11 1 9 b 16 1 34 
2300 45 24 1 18 3 42 1 98 
2400 46 38 1 14 2 4 1 31 
2500 47 53 1 15 12 00 933 1 56 
2600 49 8 1 15 58 37 1 53 
2700 50 24. 1 16 56 44 59 
2765 11 51 17 53 11 55 45 
2900 
3000 
TI t a TNT e 99 451 А ra e e 34 351 
ISON CUI offen eod uM. A du Lh оо, 100. (UIDI 
оттосо тоу ло. AN. „шу We 6 
Correction ror ОИЕ ol wite. isc tn oc oe HUND e te 158 
Correct tepih NEC IN Mb te I you отого ОВО TRO 
'The time intervals are slower than one of the deepest soundings made with 
the average, but this record is given as wire at the time it was taken. 
