Report of the Commissioner-General for the United States to the International universal exposition, Paris, 1900. February 28, 1901, read, referred to the Committee on Printing, and ordered to be printed (1901)
United States. Commission to the Paris Exposition, 1900, Peck, Ferdinand Wythe, 1848- · Washington, G.P.O · leaf 322
onstrated by A. Abt. The great dependence on mechanical influences which is characteristic of the magnetic state of nickel demands, however, careful handling of the nickel wire. It is not likely that the common steel used hitherto is exactly the most suitable for telegraphonic purposes; most… … electro-magnets of a speed regu¬ Fig. 5. lated according to the circum¬ stances. The electro-magnet E inscribes words, music, etc.; the other electro¬ magnets — “the reading magnets” — reproduce the communications in the telephone of each hearer; and, finally, the obliterating magnet V equalizes…
Exposition universelle internationale de 1900 (Paris, France) · Art · Industries
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