Trebel, George. [from old catalog] · New York, F. Tousey · leaf 41
irections, though still parallel;they repel one another. The two helices appear to be polarized like two magnets, andfor many purposes may be considered magnets. Observe thatat one pole of each helix the current revolves id the direction HOW TO MAKE AND Si that the hands of a watch move, and at the… … the movement of the hands of a watch. They attract one an-other; but if the same pole of the helix is approached bythe south pole of the magnet, repulsion.follows. * Hence, thatis the south pole of a helix where the current corresponds tothe motion of the hands of a watch (S), and that is the…
Electricity
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