Deep-sea sounding and dredging; a description and discussion of the method and appliances used on board the Coast and Geodetic Survey Steamer, "Blake." . 2 103 0 speed heing knots. 100 fathoms came 1,500 74 76 77 1 upon the reel in 3 lO*; but on attempt- 1,750 105 108 110 0 ing to reel in the second 100 fathoms at 1,750 75 77 78 1 the rate of about 3™, the vessel going 2,000 125 126 128 0 at the same speed as before, the wire 2,000 75 78 79 1 parted—a fair break, and not in a splice. It is seen that when the wire parted it was being hauled
Deep-sea sounding and dredging; a description and discussion of the method and appliances used on board the Coast and Geodetic Survey Steamer, "Blake." . 2 103 0 speed heing knots. 100 fathoms came 1,500 74 76 77 1 upon the reel in 3 lO*; but on attempt- 1,750 105 108 110 0 ing to reel in the second 100 fathoms at 1,750 75 77 78 1 the rate of about 3™, the vessel going 2,000 125 126 128 0 at the same speed as before, the wire 2,000 75 78 79 1 parted—a fair break, and not in a splice. It is seen that when the wire parted it was being hauled through thewater, with the lead and stray-line attached, at a speed of knots or one hundred and forty-four and three-fourths fathoms per minute,which is at the rate of one hundred fathoms in seconds. When therewere 2,000 fathoms out, and the vessel was making a speed of knots,the wire, line, and lead were being towed at the rate of one hundred fath-oms in seconds, yet the maximum strain upon the wire was only onehundred and twenty-eight pounds, of which about forty-five pounds weredue to the stray-line and sinker. 1. THE SOUNDING-MACHINE AND ITS USE. 83 Although the table shows that an accumulator, as such, is not requiredwhen reeling in while steaming ahead, yet as a dynamometer it wouldperform important service. The dynamometer, by showing the strain uponthe wire at each instant, would permit a safe and rapid rate of reeling inwithout a resort to time-interval checks involving a considerable calcula-tion, or to the use of prepared tables; and should sea-weed or other mat-ter held in suspension below the surface of the water foul with the lead orsounding-rod the fact would be made known at once by the dynamometer. In the performance of the operation under discussion the main objectwould be to get the vessel as far ahead on her course as possible; while thetime consumed in reeling in would be of secondary importance, and needbe limited only by th
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherwashingtongovtprin
