Children's toys, and some elementary lessons in general knowledge which they teach (1877)
Erle, T. W. (Twynihoe William), 1828-1908 · London : C. Kegan Paul · leaf 186
n its last place of retreat, squeezed by the flood, which continues to be pumped in as before, it exerts in its turn a very powerful, but equable and sustained pres- sure of reaction on the water below it, forcing it in a copious stream through the exit pipe. To the outside end of this pipe is… … pumps, both feeding one and the same air chamber, since a fuller head of water, and a more vigorous and better sustained fountain is thus obtained, instead of the somewhat intermittent series of jets which would follow on the strokes of a single piston. Toy fire engines
Toys · Science
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
