Deep-sea sounding and dredging; a description and discussion of the method and appliances used on board the Coast and Geodetic Survey Steamer, "Blake." . the out-side flanges of the drum at the points C, C. No brass is to be employed in the manufacture. This reel weighs about eighty-one pounds without the axle ratchet-wheel and worm, and about ninety-five pounds when fully equipped. The drum should exactly accommodate one fathom of the sounding-wire at a single turn. The diameter of a circle having a circumferenceof one fathom is inches, and this being decreased by 0,028 inch,thickness
Deep-sea sounding and dredging; a description and discussion of the method and appliances used on board the Coast and Geodetic Survey Steamer, "Blake." . the out-side flanges of the drum at the points C, C. No brass is to be employed in the manufacture. This reel weighs about eighty-one pounds without the axle ratchet-wheel and worm, and about ninety-five pounds when fully equipped. The drum should exactly accommodate one fathom of the sounding-wire at a single turn. The diameter of a circle having a circumferenceof one fathom is inches, and this being decreased by 0,028 inch,thickness of the wire, gives as the diameter of the drum inches. All the joints sJwuldhave, as nearly as possible, a perfect^t, that the reelmay he very strong as a whole. A reel made after the drawings shown on Plate 16 was put on boardthe Blake when the vessel had come under the command of CommanderBartlett. The view of this reel from which Plate 17 was made was ob-tained during a rain and the plate is therefore not very successful. Under the direction of Commander Bartlett, Lieutenant Wallis sub- U. S. COAST SURVEY. DEEP SEA SOUNDING AND Ftq. 1 1,1,1,1,1,,I,I,I,l„iJScale of Inches Ft^.2 NEW STKEL REEL POR SOU-NDTNG AVITH WIRE. DEVISED BY LIEUT COMDB. , U. COAST SURVEY THE SOUNDING-MACHINE AND ITS USE. 85 jected the new steel reel to the following experimental test: 3,868 turns(4,025 fathoms) of sounding-wire was wrapped upon it under an invariabletension of fifty pounds. If every part of the reel and the enwrapped wireremained rigid throughout, then the reel must have sustained a crushing force of 172if|^ tons; (^ 2940 )• Granges were carefully applied to various parts of the reel during the experiment and on its the whole 4,025 fathoms had been reeled up, the outer flanges A, Aof the drum were found by the gauge to have retained the same distancefrom each other which they had at first, and no part of the reel had suffere
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherwashingtongovtprin
