Identifier: sciencerecordcom1874beac (find matches)
Title: The Science record; a compendium of scientific progress and discovery
Year: 1872 (1870s)
Authors: Beach, Alfred Ely, 1826-1896
Subjects: Technology Industrial arts
Publisher: New York, Munn
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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he same process explains the presence in sea-water ofcarbonate of lime, which forms a large part of the oozefound covering the bottom of the sea. Chlorides are notthe only solid constituents of spring and river waters.For every grain of chloride, such waters contain on anaverage from six to eight grains of carbonate of lime. Thisis swept down to the ocean ; the carbonic acid in the water,by which alone the carbonate of lime is rendered soluble,is dissipated by the suns heat at the surface of the sea,and the carbonate of lime subsides in fine particles to thebottom, forming the impalpable mud or ooze described ascoating the lower half of the recovered Atlantic cable,This sediment is doubtless partly made up of the chalkyexuviae of marine animal life, but that its bulk is chieflythe product of a process like that above described seemsclear, since on any other basis we are unable to accountfor the disposal of the enormous quantity of carbonate oflime daily carried by rivers into the sea.
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NEW INSTRUMENT FOR DEEP-SEA SOUNDING. 5IO SCIENCE RECORD. NEW INSTRUMENT FOR DEEP-SEA SOUNDING. The essential features of this device are a rod or wire A,provided with a screw-thread upon its exterior, and asmall propeller-shaped indicator B, which works on thisscrew-thread. Weights consisting of sand-bags are attach-ed by arm F to the lower end of rod A, and a float G tothe upper end. When the instrument is thrown over-board, it sinks to the bottom, and by its descent the indi-cator B turns, and rises on the screw-thread, carrying- up-ward the stop C. When the weights touch bottom, theyare instantly disengaged from the instrument, which isthen carried up to the surface by the float G, and by thisupward motion the indicator B is made to revolve in thecontrary direction. Each turn of B counts for a certainnumber of feet traversed- by the instrument. The positionof C indicates the depth from surface of the water tobottom : and the position of the indicator B, when theinstrument rises an

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