A practical treatise on the manufacture of colors for painting : comprising the origin, definition, and classification of colors; the treatment of the raw materials .. etc. . filled with the litharge, then beginsthe introduction of the fumes of vinegar distilled inan ordinary still, and of carbonic acid kept in a gasholder in an adjoining room. Before removing thecovers of the trays, the stopcocks in the pipes throughwhich the vinegar vapors and the carbonic acid j^assare turned oflP. By these means, when the propertemperature has been maintained, the oxid^ of lead istransformed into carbonate
A practical treatise on the manufacture of colors for painting : comprising the origin, definition, and classification of colors; the treatment of the raw materials .. etc. . filled with the litharge, then beginsthe introduction of the fumes of vinegar distilled inan ordinary still, and of carbonic acid kept in a gasholder in an adjoining room. Before removing thecovers of the trays, the stopcocks in the pipes throughwhich the vinegar vapors and the carbonic acid j^assare turned oflP. By these means, when the propertemperature has been maintained, the oxid^ of lead istransformed into carbonate. Another method of manufacturing white lead,proposed by the same inventor, consists of a series oflarge stoneware jars a (Fig. 9), in which are suspended,by woollen or cotton cords, several sponges whichdo not touch the sides of the capillary attraction, a solution Fig. 9. of neutral acetate of lead held inX keeps the sponges wet. Thesalts of lead are transformed intocarbonates by a current of carbonicacid which passes through the sponges are then removed,and washed in pure water. Aftersettling, the clear liquors are de-canted for a future
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherphila, bookyear1874
