b. A bell actuated by electric connections (Bell). (The telegraphic sounder.)
c. Mechanical, noisy deviceor obtaining sonorous vibrations has been made by Professor A. Graham Bell and Clarence J. Blake, M. D., of Boston, Mass. (Jnt current was passed through the iron rod itself; and Professor Bell has produced similar effects by passing the current the working at this form of apparatus, — Elisha Gray and A. G Bell of the United States, and La Cour of Denmark.
See English ents, 166,094, 156,095, 166,096, of 1875; 175,971 of 1876.
Bell's patents, 161,739 of 1875; 174,465 of 1876.
In Gray's enetizations.
Gray's analyzer, or receiving-instrument.
Fig. 6269 is a perspective view of one fapparatus of sounding, recording, and printing telegraphs.
Bell's patent, No. 161,739, April 6, 1875, comprises a transmittct drawn upon the metallic foil at the transmitting end.
Bell's patent, No 174,465, March 7, 1876, describes a method of