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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n about to clean a gun, some tow iswrapped about the rod and enough petroleum pouredupon it to thoroughly moisten it ; it is then pushed in arotary manner through the barrel and back a dozen times,and the hemp taken out and unrolled, and the upper andlower ends of the barrel rubbed with the clean part, afterwhich it is thrown away. This removes the coarser por-tion of the dirt. The brush is then moistened thoroughlywith petroleum and twisted into the barrel, running it backand forth at least a dozen times, thus loosening the dirtthat is more firmly attached to it. The first operation isnow repeated, except that the hemp or tow on the rod isleft dry, and the rubbing with this must be continued inall directions as long as it comes out soiled. The use ofwire brushes is objectionable for cleaning guns, as thenumerous little steel points cut into the tube. Only softtow, hemp, woolen rags, or the like, should be used, as thepetroleum dissolves off the dirt sufficiently. 2-82 SCIENCE RECORD.
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COMBINED SHIPS PUMP, FIRE-ENGINE, ALARM-WHISTLE, AND TELEGRAPH. There is no worthier aim for inventors than the con-struction of apparatus to increase the safety of life on thesea. The apparatus represented in our engraving hasthis aim, and, moreover, is distinguished for the diversityof its workings. It can be used as alarm-signal in fog, astelegraph, as pump for draining off water from the bottomof the ship, for washing and cleaning the deck, and, final-ly, as a fire-engine. The frame supports three pump-cylinders A, whose pis- MECHANICS AND ENGINEERING. 28$ tons are connected by rods B with the common crank-shaft C. The cranks are arranged under angles of i2o°onthe shaft. The latter is provided at one end with a fly-wheel D, which is turned b)r manual power, applied to thecrank a. The opposite end of the crank-shaft has a spur-wheel E, which receives motion from a toothed wheel F,operated by crank G. A slow motion may be given to thepumps by turning the handle a. But a quicker mot

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