File:A supplement to Ures Dictionary of Arts, Manufactures, and Mines, - containing a clear exposition of their principles and practice. (1864) (14779254914).jpg

Identifier: supplementtoures00hunt (find matches)
Title: A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice.
Year: 1864 (1860s)
Authors: Hunt, Robert, 1807-1877
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Publisher: New York : Appleton and company
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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rine worts during fermentation, by the conversion of the sugar into alcohol and car-bonic acid. AURUM MUSIVUM or JIOSAICUif. Mosaic Gold.—For the preparation of Mo.saiegold, the following process is recommended by Woulfe. An amalgam of 2 parts of tin and1 part of mercury is prepared in a liot crucil)le, and triturated with 1 part of sal-ammoniac,and 1 part of flower of sulphur; the mixture is sulilimed in a glass flask ufion thesand l)ath. In breaking the flask after the operation, the sublimate is found to consist,superficially, of sal-ammoniac, then of a layer of cinnabar, and then of a layer of Mosaicgold. There are several other processes given for the preparation of this bisulphide of tin, butthe above prol)ably gives the best results. AVOCADO PEAR OIL. 125 Bergman mentions a native aui^m rmisivum from Siberia, containing tin, sulphur, anda small proportion of copper. Dr. John Davy gave the composition as— Tin - - - -, - 100 I SulphurBerzelius as— Tin 100 56-25 Sulphur 52-3
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Mosaic gold is employed as a bronzing powder for plaster figures, and it is said to entersometimes into the composition of aventurine. AUTOGENOUS SOLDERING. A process of soldering by which metals are unitedeither by the ordinary solders or by lead, under the influence of a flame of hydro- 48 gen or of a mixture of hydrogen andcommon air. The process of using air and hydro-gen was invented in France, by the Countde Richemont. Hydrogen gas is con-tained in a gasometer, to which a flexibletube is connected, and air is urged froma bellows worked by the foot, throughanother tube, and on to the blowpipe,where the hydrogen is ignited. By meansof the flexible tubes the flame can bemoved up and down the line of any joint,and the connecting medium melted. Fig.48. This process has been a good deal employed for plumbers work, especially in our navalarsenals. AUTOMATIC ARTS. Such arts or manufactures as are carried on by self-acting ma-chinery. AVENTURINE. (Aventurine, Fr.) A variety of quartz whi

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