Inside Out Library · Explore

Scientific American, Vol. 89, No. 4 (1903) (1903)

leaf 10

An illustration from Scientific American, Vol. 89, No. 4 (1903), 1903, leaf 10
turn freely in the boxes, so that boots become useless. The present invention, there- the boxes can swing to take up any unevenness in the fore, provides a waterproof leather heel protector sure bulb, at each end of which is a valve.. These valves.are normally open, so as not to interfere with… … made by means of a pair of spring-pressed pins in the prises the shank A, with fub, which engage notches in the spherical portion, C. the usual handle, C, and In our illustration, the section is so taken that neither the chamber E, for the the proper circulation of the water. By compressing of the…

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 89, No. 4 (1903)

More like this