The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 68
ided into onehundred squares, each having thesame sectional area as the square tube containing the vertical column.Thus the proportional areas of thecolumns of the tube and bellowsare definitely shown. At B is aa three-way stop-cock, by which thea communication between the tubeand bellows is cut… … * A small quantity of water should be poured into the bellows, suflBcient toseparate the boards a trifle, before placing the weights upon these. t Different forms and sizes of tubes, with their funnels, are represented inthe figure. These tubes are made to screw together, so as to increase…
Physics
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