I.C.S. reference library : a series of textbooks prepared for the students of the International Correspondence Schools and containing in permanent form the instruction papers examination questions, and keys used in their various courses (1904)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 402
as high as 2,000 times that of air.If, therefore, a piece of soft iron be inserted into the mag-netic circuit of a solenoid, the number of lines of force willbe greatly increased, and the iron will become highly mag-netized. 31. A magnet produced by inserting a magnetic sub-stance into the magnetic… … 24 ELEMENTS OF In the ordinary form of electromagnet, the magnetizingcoil consists of a large number of turns of insulated wire,that is, wire covered with a layer or coating of some non-con-ducting or insulating material, usually silk or cotton; other-wise the current would take a shorter and…
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