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Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 98
o be no longer magnetic.A similar chain of steel needles may be formed, butthey will retain their magnetism permanently. It will be found, however, that a steel needle is moredifficult to magnetise than an iron needle of the samedimensions. It is harder to get the magnetism intosteel than into… … CHAP. II.] ELECTRICITY AND MAGNETISM. 81 coefcivB force; a much better term, due to Lament,is retentivity. The retentivUy of hard-tempered steelis greats that of soft wrought iron is very small. Theharder the steel, the greater its retentivity. ©L Theories of MagnetisnL—The student willnot have…Electricity · Magnetism
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