Marion and Co., author · London W. : Marion and Co., 22 and 23 Soho Square · leaf 295
tinuous change of water without persona supervision. When the water arrives near the top, the Syphon commences to operate and swiftly empties the tank. The water from the tap, running in all the time, soon begins to refill it, and thus the operation goes on continuously and the plates get repeated… … Easily adjusted to any figure. SCALES AND WEIGHTS. For Prices see General List, p. 260.
Photography -- Handbooks, manuals, etc
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