Meadowcroft, Wm. H. (William Henry), 1853- · New York : The American Technical Book Co · leaf 97
free when it is not in the immediate presence of acharge of the opposite sign. For instance, inthe illustration above given, the negative (or —)charge induced upon the end of the insulatedcylinder is bound by the attraction of thepositive (or +) electrification of the insulated ball,while the +… … the + attraction of the ball will remain bound even if a conductor, or path, be offered for it togo to earth. It may be superfluous as regards some of ourreaders but helpful to others in more readily comprehending the philoso-phy of a Static Machine, todescribe an instrument de-vised by Volta for…
X-rays
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