ane ener etaee, tanec ae 
ae 3 thea s sat 
176 W. P. Trowbridge on Deep Sea Soundings. 
VIL— Comparison 4 peciaitbiiccs upon the same lengths 2 lines of rics 
ent diameters, moving at the same velocit 
Deep Sea Line. Small Line. 
Velocity. tS men Resistan eae [Resistance 
96 Ib, R. upon one 1 32-1b. R. en one 
Weight. Fathom. Shot. cag, Be Fathom. | 
Feet, | Fathoms. | Pounds. — Pounds. Fathoms. | Pounds. | Pou 
e 120 See 
45 140 416 100 
us 170 ; 43°8 20 
65 200 452 0°8765 150 21°% 07144 
6 240 76°6 0°3191 90 23°2 0122 
55 00 57°8 0°2593 230 24°5 0°106 
5° 380 78°38 0°2073 290 25°7 0°088 
4°5 520 49°6 071530 35 26° 0076 
4 41 80°2 071129 480 28°2 0°058 
3°5 1080 80-7 0°0747 650 29°7 07045 
3° 650 81°2 0°0492 880 81°3 0°035 
_ | Depth. ] |_Depth, é 
a5 si ls3i-s1 2s se is8 
8 ee 42 Diff.|R'—R) R' 2% 28 | So| 23 | Dit |R'— R’ | 3) 28 
= Sa |Sa 38 | se | $2 | 3& | 32 | 
ae wins {a5 [as | oe |B ag [as 
Peet.|Fath.|Fath |Fath,|Pounds| P’ds, & | Path. Path. |Fath. |Pounds Pads. : | 
= 8° | 70| 200 120) 175 “ 
7°5|100| 220 140] 200 96'8 
‘T 1120] 280 170} 240 100-0 ; 
6°5 | 150} 340] 190) 25-9 |47-6|1-789/1°838, 200] 280} 80| 26-2 101°5 350038 
6" | 190} 420) 230) 25-3 |48-5]1-826/1-917| 240] 330] 90] 26-1 |102°7/3:6663°93 
5°5|230| 510) 280] 24-8 |49-3/1-821/1-988| 300} 400) 100 | 26-1 |103-9|4-000)3'981 
: é 
540) 350) 25°3 | 50-0 
1 
90 1 1 976) 880] 500] 120 | 26°3 |104°94°166 
45} 350| 820; 470) 24°1 |50°8/1-745/2 
1 2 
1 
08! 520| 660] 140] 26-1 105°7/4-7144-08 
1 
4 |480/1080) 600| 33-6 |51-8|1-800)2"1 80] 17 
'3°5/650/1400' 750| 22-7 |52-4|1-866!2-308/1080|1340| 260 | 268 |107-2'5-1 
3: [8801190011020 1650; —| | 
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IX.—Table showing the rates of descent, velocity, resistance to sinker and 
line, and weight of line in water, from observations made by Lieut. 
Comm. Joseph Dayman, R. N. Diameter of line 2 inches. Specific 
: gravity 1:3. Weight 96 pounds. 
Intervals of Resistance Resistance | Weight of 
Times of Velocity. to to Line in 
Sinker. Line. Be coma 2 
Pounds, Pounds. da 5 
82°0 
562 100°6 23 
4:35... 119-4 
433 13871 69 
1568 
1755 115 
1942 138 
212-9 161 
8 2316 184 
= ‘eee ee eeeee l 250°3 ~ 207 
