. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. hole at l, closed with a screw this hole a wire rammer maybe introduced, to ascertain that the tube ispervious, and to cleanse it from the mer-curial soot, when thought necessary, c, isa cross section of the main condenser, shownin a longitudinal section at c c, fig. pipe is 18 inches in diameter, andabout 20 feet long. At a a, iic, the backends of the retorts are seen, with theslanting tubes b b, &c., descending throughorifices in the upper surface of the con-
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. hole at l, closed with a screw this hole a wire rammer maybe introduced, to ascertain that the tube ispervious, and to cleanse it from the mer-curial soot, when thought necessary, c, isa cross section of the main condenser, shownin a longitudinal section at c c, fig. pipe is 18 inches in diameter, andabout 20 feet long. At a a, iic, the backends of the retorts are seen, with theslanting tubes b b, &c., descending throughorifices in the upper surface of the con-denser pipe, and dipping their ends justbelow the water-line h i. g, is the cap ofa water valve, which removes all risk fromsudden expansion or condensation. Thecondenser is placed within a rectangular trough, made either of wood or stone, throughwhich a sufficient stream of water passes to keep it perfectly cool, and repress everytrace of mercurial vapor, and it is laid with a slight inclination from i to h, so that thecondensed quicksilver may spontaneously flow along its bottom, and pass through the.
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
