Cooley's cyclopaedia of practical receipts and collateral information in the arts, manufactures, professions, and trades including medicine, pharmacy, hygiene, and domestic economy : designed as a comprehensive supplement to the Pharmacopoeia and general book of reference for the manufacturer, tradesman, amateur, and heads of families . particu-larly with wines, beer, and other fermentedliquors, due care being observed, it gives re-sults closely approximating to those obtainedby distillation, and sufficiently accurate for allordinary purposes. In testing strong alcoholicsolutions it is, theref
Cooley's cyclopaedia of practical receipts and collateral information in the arts, manufactures, professions, and trades including medicine, pharmacy, hygiene, and domestic economy : designed as a comprehensive supplement to the Pharmacopoeia and general book of reference for the manufacturer, tradesman, amateur, and heads of families . particu-larly with wines, beer, and other fermentedliquors, due care being observed, it gives re-sults closely approximating to those obtainedby distillation, and sufficiently accurate for allordinary purposes. In testing strong alcoholicsolutions it is, therefore, proper to dilute themwith twice their bulk of water; and com-mercial spirits, with an equal bulk of water;the results obtained being doubled or tripledas the case may be. d. Prom the expansion of the liquidwhen heated : Silbermanns expansion of alcohol between 0° and 212°Fahr. is triple that of water; and between77° and 122° Fahr. it is much greater. Be-tween —14° and —98° Fahr. the rate of ex-pansion is about the -00047th part in volumefor every degree of Fahrenheits scale. Themeasurement of this expansion has been pro-posed as a new and ready method of alcoholo-metry, adapted to nearly all spirituous andfermented liquors. Silbermanns instrument,which is based on it (see engr.), simply consists. Ols, This method does not answer well withspirituous liquor above proof/ owing to the of a flat brass or ivory plate {A), on whichare fixed a mercurial thermometer (D) gra-duated from 22° to 50° Cent. ( = 77° to 122°Fahr.); and the dilatatometeb {S), whichis a glass pipette open at both ends. A valveof cork, or vulcanised India rubber, closesthe tapering end (c) ; this valve is attached toa movable rod (C) which is fastened to thesupporting-plate, and connected with a spring 68 ALCOHOLOMETRY (f) and a handle (g) bearinsf a four-threadedscrew, by which the lower orifice of the pipettecan be opened or closed at will. Tn use, thepipette is filled with
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