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ts to cohere, or weld together, a condition easily destroyed by tapping. A common form of coherer as used in wireless telegraphy consists of a tube containing filings (usually a pinch of nickel and silver filings in equal parts) between terminal wires or plugs (called conductor plugs).

electric waves falling on this contrivance increase its resistance several times. The anticoherer can be used in conjunction with a telephone.

A self-restoring coherer, as a microphonic detector.

A device for restoring a coherer to its normal condition after it has been affected by an electric wave, a process usually accomplished by some method of tapping or shaking, or by rotation of the coherer.

Designating, or pert. to, Marconi's system of wireless telegraphy; as, Marconi aërial, coherer, station, system, etc.

G. Marconi, an Italian physicist, in which Hertzian waves are used in transmission and a coherer is used as the receiving instrument.

substance or device that has its conductivity altered in some way by electric waves, as a coherer.

h a lofty antenna. The receiving apparatus consisted of another antenna in circuit with a coherer and small battery for operating through a relay the ordinary telegraphic receiver. This apparatus contains the essential features of all the systems now in use. -- Wireless telephone, an apparatus or contrivance for wirele…