Electricity of relatively low potential and large quantity; current electricity as distinguished from static electricity; electricity in motion.

The producing mordanting or other dyeing effects on goods in dyeing by the passage of an electric current.

A chemical term; an element which in combination replaces two monovalent elements; one which has two bonds or is bivalent.

The tube or compartment in an electric subway for the reception of a cable.

1. The magnetism excited at any transverse section of a magnet is proportional to the square root of the distance between the given section and the end. 2. The free magnetism at any given transverse section of a magnet is proportional to the difference between the square root of half the length of the magnet [...]

A drum with a mechanism within for striking the head with a hammer or some equivalent method so as to be used as a piece of magical apparatus. In the one shown in the cut a sort of telephone action is used to produce the sound, the electro-magnet D and armature being quite screened from [...]

A switch or circuit breaker, operating to close a circuit by dropping under the influence of gravity. It is held up by a latch, the circuit remaining open, until the latch is released by a current passing through an electro-magnet. This attracting an armature lets the drop fall. As it falls it closes a local [...]

A substance for solution for use in bichromate batteries. It is a mixture of one-third potassium bichromate and two-thirds potassium bisulphate. It is dissolved in water to make the exciting fluid.

Projections on the periphery of an armature of a dynamo for holding the winding in place and preventing its displacement. Various arrangements have been adopted. They are sometimes wedges or pins and are sometimes driven into spaces left in the drum core. The toothed disc armature cores make up an armature in which the ridges [...]

A looping downward of wires entering a building, so that rain water, as it runs along the wire, will drip from the lowest part of the loop instead of following the wire into or against the side of the building.