Meadowcroft, Wm. H. (William Henry), 1853- · New York : The American Technical Book Co · leaf 66
reaker can be madeby mounting two rings upon a circular slatebase, one of the rings having several sectionscut out for the purpose of obtaining the necessarybreaks in the continuity of the current. Theser.ngs may be fastened to the slate base by meansof screws and the whole mounted either upon… … Fig. to. Two brush-liolders are mounted so that brushesmay be inserted and so arranged as to bear evenlyupon the surface of these two rings. If the slateis cut so as to be flush with the surface of the bro-ken ring between the sections a smoother runningapparatus will be the result than if the face…
X-rays
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