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 inches. 1i inch, i2 inches. |I inches. 2 inch. 3 inch. i feet. 14 inches. 2^ inches. I ^ inches. f inch. I feet. The drag-rope for the tangles should be very strong, to resist the frequent andsudden strains when using them on rough bottoms. 166 DEEP-SEA SOUNDING AND DEEDGING. THE CHECK-STOP. This arrangement was devised by Oapt, L. A.
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 inches. 1i inch, i2 inches. |I inches. 2 inch. 3 inch. i feet. 14 inches. 2^ inches. I ^ inches. f inch. I feet. The drag-rope for the tangles should be very strong, to resist the frequent andsudden strains when using them on rough bottoms. 166 DEEP-SEA SOUNDING AND DEEDGING. THE CHECK-STOP. This arrangement was devised by Oapt, L. A. Beardslee, for use on board the? Bluelight, in 1873. Its piirpose is to put the strain of the drag-rope (B) upon a weaker rope (0), which may be so easilybroken in case the dredge or trawl catchesupon rocks as not to cause damage to theapparatus, and at the same time to givesufficient warning to allow the slack of thedrag-rope to be payed out before the head-way of the vessel can be stopped. It hasproved to be a very useful and simpleexpedient for these purposes. The figureshows the arrangement so well that no fur-ther description is THE CEADLE-SIEVE. This form of sieve was devised by thewriter in 1872. It was so constructed as toafford the means of rapidly washing outthe large quantities of mud often broughtup by the dredge and rake-dredge, and atthe same time to keep the mud and wateroff the deck as much as possible. It consists of two wooden end-pieces, in shape forming rather more than half a circle, united by two narrow wooden side- J.—Beardslees Check-Stop. pieces set into the end-pieces so as to leave a flush surface. The outside covering consists of two thicknesses of wire netting, the inner one with meshes of one-twelfth inch or less; the outer one of stout galvanized- iron wire with one-half-inch meshes. The outer netting is only to afford support and protection to the inner one. The netting-is nailed to the edges of the wooden end-pieces and to the sid
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherwashingtongovtprin
