An experimental study of the fahy permeameter (1918)
National Bureau of Standards · leaf 12
r a specimen 25.4 cm long. However, it frequently happensthat it is necessary to test other lengths. Sometimes one wishesto know the magnetic characteristics of a portion of a long barwithout cutting the bar. With tliis in view the end of a long barwas measured once with the whole bar intact and… … Fig. 4.—Showing the effect of projection of a long specimen The solid curve shows normal induction for a specimen of proper length and the circles represent pointstaken with a projection of 150 cm. with the test-coil pole faces. In Fig. 4 the solid curv^e shows thenormal induction of the specimen…
Magnetism · measurements and use of instruments/ B8000 Power systems and applications
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