The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 373
at supposing the steam to be shut off by it when running either way,still the exhaust apertures remain entirely open. The simplicity ofits action, and its doing away with a considerable number of smallmoving parts consequent on reversing and management in general, bythe present methods are its… … Fig. 3.—Elevation of Cylinder and Section of Valves.
Architecture · Civil engineering · Science
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