res acquire George M. Hopkins. thermal effects are practically instantaneous, and therefore and lose their increased temperature. New York, June 28, 1880. affect simultaneously the whole length of the wire. 2. The excessive sensibility to linear expansion which fine Note.—De la Rive, in 1843 (vide… … he attributed the result to magnetic agencies (vide Count du ly employed. Another mode, less known, and less exten- Moncel, Telegraphic Journal, March 1, 1879). sively adopted, is manufacturing the fresh juice into jelly. THERMAL TELEPHONE. These and many other sonorous effects of currents on One…
