Trebel, George. [from old catalog] · New York, F. Tousey · leaf 47
e dynamoelectric lighting, which formerly was considered a curiosity, hasbeen reduced in expense so as to become a rival of gas lighting. If a core of iron, or still better, a bundle of wire (AA. Fig. 5.)is4 inserted in the primary coil it is evident that it will be mag-netized and demagnetized… … primarycurrent, greatly intensifies the secondary current. Thatis, if a coil of wire is wound around a core of iron andattached to a battery, another coil which is wound aroundthe first in an opposite direction, but having no connection USE ELECTRICITY. 41 with it, will be charged with a greater…
Electricity
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