The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 73
whidi should be about twelve pounds. 2 is a tubeplaced within the roof lube 1, which conveys the gas to the arms of thelamp, and is made fast at the screw 3. Fig. 2 is an outside view of the roof tube, with the piston, 5, ont he lower end. The tube, 2, ind icated by dottedlines, projects beyond the… … midway in the cylinder, and the exhausted or vacuum portion of the cy-linder, 6, represents oil, put on the top of the piston, for lubricating thetube, and keeping the leather cups, 8 and 9, which form the packing, airtight. 16 are two small holes, drilled through the body of the piston, whichholes…
Architecture · Civil engineering · Science
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