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Scientific American, Vol. 56, No. 18 (1887) (1887)
leaf 10
mercury. cock is best applied close to the glass nozzle. Upper hung at any desirable distance from the ground, to A glass tube is bent into the shape indicated, and ]and lower readings for both liquids are taken, just as leave sufficient head room in the street. provided with a nozzle at the… … © 1887 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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