An influence machine for producing high potential or static electricity. Two circular discs of thin glass are mounted on perforated hubs or bosses of wood or ebonite. Each hub has a groove turned upon it to receive a cord. Each disc is shellacked. They are mounted on a horizontal steel spindle so as to face [...]

(a) A conductor carrying an electric current is surrounded by circular lines of force, which are sometimes termed an electric whirl. (b) The Electric Flyer. (See Flyer, Electric.)

A system of connections applied to parallel circuits, including resistance coils for the purpose of measuring an unknown resistance. A single current is made to pass from A through two parallel connected branches, joining together again at C. A cross connection B D has a galvanometer or other current indicator in circuit. In any conductor [...]

The induction coil or transformer used in electric welding. For its general principles of construction, see Welding, Electric.

Welding metals by heat produced by electricity. The heat may be produced by a current passing through the point of junction (Elihu Thomson) or by the voltaic arc. (Benardos & Olzewski.) The current process is carried out by pressing together the objects to be united, while holding them in conducting clamps. A heavy current is [...]

An ampere-meter or ammeter. The term is not used since the term “weber,” indicating the ampere or coulomb, has been abandoned.

(a.) A name suggested by Clausius and Siemens to denote a magnet pole of unit strength. This use is abandoned. (b.) It has been used to designate the unit of quantity–the coulomb. This use is abandoned. (c.) It has been used to designate the unit of current strength the ampere. This use is abandoned. [Transcriber's [...]

Ether waves caused by electromagnetic disturbances affecting the luminiferous ether. (See Discharge, Oscillatory–Maxwell’s Theory of Light–Resonance. Electric.) [Transcriber's note: The Michaelson-Morley experiment (1887) had already called ether into question, but quantum theory and photons are decades in the future.]

A unit of electric energy or work. One watt exerted or expended for one second. It is equivalent to .24068     gram degree C. (calorie), .000955    lb. degree F., .737337    foot lbs., .0013406   horse power second (English), .0013592   horse power second (metric). Synonym–Volt-coulomb.

The product in an alternating current dynamo of the virtual amperes by the virtual volts. To give the true watts this product must be multiplied by the cosine of the angle of lead or lag. (See Current, Wattless.) [Transcriber's note: This is now called a volt-amp. The usual usage is KVA, or kilovolt-ampere.]