Trebel, George. [from old catalog] · New York, F. Tousey · leaf 24
opper are called elements,and the tumbler is called a cell.) In order to discover whatthe wire contains, we will try the following experiment. Tate an ordinary compass, or poise a magnetic needle atits center, either by pivot, as in .Figure 5, or by a fine un-twisted silk thread, and arrange the… … turns on its axis, tending to place itself at right; angles tothewire, and, after a few vibrations, takes up a permanent posi-tion, forming an angle with the wire. This deviation fromits normal position is called a deflection of the needle. Separatethe two extremities of the wire, and the needle…
Electricity
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