Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 262
^ means not very diffei-ent the same organ is addressed in teleg- … raphy; but the appeal is of a kind legible only to the expert.The bell device serves the further purpose of bringing the learnerface to face, at the outset, with the fact of the inconceivable speedof the energy he is employing,— a feature which allies it to lightin the velocity of its movement.…
Electrical engineering
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