Theory and practice of the electric telegraph; a manual for operators and students (1875)
Churchill, Charles Henry, d. 1904. [from old catalog] · Oberlin, Ohio, Sherman & bros. · leaf 31
now opposite forces face to face,obey the second law and attract each other. 4. Why do they finally repel each other? As soon as the pith strikes the glass its negative electricityis neutralized by an equal portion of positive from the glass,and having now only positive it is repelled according to… … 6. How is the gold leaf electroscope used? The gold leaf electroscope exhibits repulsion first, or repul-sion alone. . Fig. 4. The excited glass is held sev-eral inches from the knob andthe gold leaves at once divergeWhen the glass is removedthey collapse. 7. Why do they diverge?The knob and leaves…
Telegraph
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