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Scientific American, Vol. 37, No. 6 (August 1877) (1877)

leaf 4

An illustration from Scientific American, Vol. 37, No. 6 (August 1877), 1877, leaf 4
otives, on any ordinary telegraph line. ticular—it is comparatively limited in extent, and conse- and our general machinery in the leading markets of the The instrument may be said to consist of a metallic cylin- quently it does not do us the mischief which some writers world. This was to be… … petitors they have to con- These viDrations are so rapid HAVENS' NEW TELEPHONE. front competitors of first- that the lever has no time to rate ability, energy, and re- fly back and forth. Often, sources.—London {England) Colliery Qv/irdian, the great progress which American coal mining has made by…

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