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 95
n to the wheels. Experiment a. — Screw the cen-tre-post to the hole of the pump-plate, and arrange the floats so thatthose of one wheel shall stand edge-wise, and those of the other facewise,to the direction of motion. Cover w^ith a bell-glass, having abrass cap and sliding-rod ; attach the loop… … How may the materiality of air be shown with the vane and mill (Fig. 65) ?8* 90 GUINEA AND FEATHER GLASS. facewise will revolve only about one eighth as long as the oneedgewise to the direction of motion. Now work the air-pump and remove the air from the bell-glass, and again give motion to the…
Physics
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