uig's of the diaphragm of the telephone, if actuated by power- the ground, delivering them at the rear, separated from ful currents, can be shown by the nodal lines formed method of dancing flames analyzed by a rotating weeds and dirt, is shown in the accompanying illustra- by lycopodium dusted on… … the application of this method for and the lower half of the cage at COLLINS' POTATO DIQGER. testing dynamo machines, as by it the rear is covered by a semicircu- lar curtain connected to the main can be seen the actual progress of the phase in the alternating current, or the impulse at frame. The…
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