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Any of various devices to silence the humming noise of telegraph wires.

An instrument, consisting usually of a wireloop or noose, for removing tumors, etc., by avulsion. Snare drum, the smaller common military drum, as distinguished from the bass drum; -- so called because (in order to render it more resonant) it has stretched across its lower head a catgut string or strings.…

An electrodynamic spiral having the conjuctive wire turned back along its axis, so as to neutralize that component of the effect of the current which is due to the length of the spiral, and reduce the whole effect to that of a series of equal and parallel circular currents. When traversed by a current the solenoid exhi…

An induction coil, esp. of an internal-combustion engine, wireless telegraph apparatus, etc.

electric ignition, a plug, screwed into the cylinder head, having through it an insulated wire which is connected with the induction coil or magneto circuit on the outside, and forms, with another terminal on the base of the plug, a spark gap inside the cylinder.

used for determining the exact position of objects and making delicate measurements. Fine wires, silk fibers, or lines on glass similarly placed, are called spider lines. -- Spider mite. (Zoöl.) (a) Any one of several species of parasitic mites of the genus Argas and allied genera. See Argas. (b) Any one of numerous s…

trument of music resembling a harpsichord, but smaller, with one string of brass or steel wire to each note, sounded by means of leather or quill plectrums or jacks. It was formerly much used. Dumb spinet. (Mus.) See Manichordon.

culture made by inoculating a solid medium, as gelatin, with the puncture of a needle or wire. The growths are usually of characteristic form.

observing the number of the graduations of the rod that are seen between certain parallel wires (stadia wires) in the field of view of the telescope; -- also called stadia, and stadia rod.

A loop of iron, or a bar or wire, bent and formed with two points to be driven into wood, to hold a hook, pin, or the like.

One of the twists, or strings, as of fibers, wires, etc., of which a rope is composed.

A stiff wire, inserted in catheters or other tubular instruments to maintain their shape and prevent clogging.

gallery; especially, a passage under a street, in which water mains, gas mains, telegraph wires, etc., are conducted.

which they are suspended. -- Suspension bridge, a bridge supported by chains, ropes, or wires, which usually pass over high piers or columns at each end, and are secured in the ground beyond. -- Suspension of arms (Mil.), a short truce or cessation of operations agreed on by the commanders of contending armies, as f…

Of or pert. to syntony; specif., designating, or pert. to, a system of wireless telegraphy in which the transmitting and receiving apparatus are in syntony with, and only with, one another. -- Syn*ton"ic*al (#), a. --Syn*ton"ic*al*ly, adv.

of a certain wave length; to tune; specif., to put (two or more instruments or systems of wireless telegraphy) in syntony with each other. -- Syn`to*ni*za"tion (#), n.

denser with a pair of adjustable spark balls, for attuning the time periods of antennæ in wireless telegraphy (called also syntonizing coil).

of an apparatus emitting electric oscillations and that of a receiving apparatus, esp. in wireless telegraphy.

Hence, to draw from (anything) in any analogous way; as, to tap telegraph wires for the purpose of intercepting information; to tap the treasury.

An instrument for recording and reproducing sound by local magnetization of a steel wire, disk, or ribbon, moved against the pole of a magnet connected electrically with a telephone receiver, or the like.