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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to bemixed with it, if to be kept for a long time; but Messrs.Gail & John G. Borden state that, by first heating themilk in a closed vessel above 2120 Fahr. so as to destroyany germs of fermentation, and then condensing it in avacuo in the usual way, the addition of sugar may bedispensed with. PRODUCING TURPENTINE FROM SAWDUST. S. L. Cole, of Brooklyn, N. Y., states that turpentinemay be economically manufactured by loading sawdust inmetallic cars which are run into a steam-tight chamber,and the sawdust subjected to steam of a high temperature,which will cause the turpentine to collect in the bottom ofthe chamber. ENDLESS BELTS. Leedham Binns, of Oakenshavv, England, proposes tomake endless belts or ropes for driving machinery, etc.,by winding sufficient material in the form of a skein, thenproperly securing the ends, and next covering said corewith other strands, either by winding, weaving, or braid-ing. If preferred, a covering of caoutchouc maybe addedand the whole vulcanized.
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(192) JOHN W. DRAPER. (SEE BIOGRAPHY.) coc r ELECTRICITY, LIGHT, HEATl SOTJND: J igi ELECTRICITY, LIGHT, HEAT, SOUND. THE ELECTRICAL CONDENSER. In the working of the steam-engine, the office of thecondenser is to assist the power and economy of themachine, by rapidly removing the back pressure of theexhaust-steam and converting it into water for re-use inthe boiler. In a somewhat analogous manner, the em-ployment of the electrical condenser appears to facilitateand improve the working of certain kinds of telegraphs.When a battery current is sent through an insulated tele-graph wire, there is produced another current, termedstatic induction, which interferes with the operation ofthe battery current. On the ordinary pole telegraph with the ordinary in-struments, the static induction gives little trouble ; butin the case of subterranean and submarine cables, the in-duced currents prevent the rapid working of the instru-ments. The electrical condenser consists of tin-foil, separatedby she

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