. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. The explosive eudiometer, inwhich about two measures of hydrogen are introduced into a graduated glass tube, con-taining five measures of atmospheric air, and an electric spark is passed across the mix-ture, is the best of all eudiometers; and of these the syphon form, proposed by me in apaper published by the Royal Society of Edinburgh in 1819, is probably the surest andmost convenient. Voltas explosive eudiometer, as made in Paris, costs 3 guineas; minemay be had nicely graduated
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. The explosive eudiometer, inwhich about two measures of hydrogen are introduced into a graduated glass tube, con-taining five measures of atmospheric air, and an electric spark is passed across the mix-ture, is the best of all eudiometers; and of these the syphon form, proposed by me in apaper published by the Royal Society of Edinburgh in 1819, is probably the surest andmost convenient. Voltas explosive eudiometer, as made in Paris, costs 3 guineas; minemay be had nicely graduated for 6 or 8 shillings. EXPANSIOiV (Eng. and Fr.; Ausdehnung, Germ.) is the increase of bulk experiencedby all bodies when heated, unless a change of chemical texture takes place, as in thecase of clays in the potters kiln. Table i. exhibits the linear expansion of several solidsby an increase of temperature from 32 to 212^ Fahr.; Table II. exhibits the expansionin bulk of certain liquids. Table I.—Linear Dilatation of Solids by which a bar takes at 212°, whose length at 32° is Dilatation Dilatation Substances. Authority. in in Vulgar Decimals. Fractions Glass tube - - - - - Smeaton 1-00083333 do. Roy - l-t)00776l5 do. Delucsmean - 1-00082800 nVo do. Dulona; and Petit 1-00086130 1 TT78 do. Lavoisier and Laplace 1-00081166 Plate glass .... do. do. 1-000890890 1125 do. crown glass - - . do. do. 1-00087572 114 2 do. do. ... do. do. 1-00089760 1] 141 do. do. - - do. do. 1-00091751 1090 do. rod .... Roy . - 1-00080787 Deal Roy, as glass Plalina Borda - 1-00085655 do Dulong and Petit 1-00088420 TTsT do. Troughton 1 00099180 do. and glass - . . Berthoud - 1-00110000 Palladium - - . - Wollaston 1-00100000 Antimony - - . . Smeaton 1-00108300 Cast-iron prism ... Roy - - . 1-00110940 Cast-iron ..... Lavoisier, by Dr Youn? l-OOHini Steel Troughton 1-00118990 EXPANSION. 455 Uilatatmii Dilatation Substances. Authority. ill m Vulvar Decimals. Fracliona. Steel rod
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
