A system of telegraphy in which in the receiving instrument a hand is made to move step-by-step, with an escape movement around a dial. For each step there is a letter and the hand is made to stop at one or the other letter until the message is spelled out. (See Dial Telegraph.)

Luminous static discharge effects sometimes seen on objects elevated in the air. They are especially noticed on ships’ masts. The sailors term them corpusants (holy bodies). They resemble tongues or globes of fire.

The deposition of iron on copper plates by electrolysis. In electrotyping a thin deposit of iron is thus given the relief plates before printing from them. The deposit is very hard and exceedingly thin, so that it does not interfere with the perfection of the impression in the printing process. As the iron becomes worn [...]

A compound of iron with carbon. The carbon may range from a few hundredths of one per cent. up to two per cent. For magnets, tool steel drawn to a straw color or a little lower is good. All shaping and filing should be done before magnetization.

In alternating current distribution, a building or place where a number of transformers are worked, so that low potential or secondary circuits are distributed therefrom.

The end of a telegraph line where the operators using the expression are working.

The place at the further end of a telegraph line, as referred to the home station.

The building or place in which are placed electrical apparatus, steam engines and plant supplying a district with electric energy.

Electricity at rest or not in the current form ordinarily speaking. The term is not very definite and at any rate only expresses a difference in degree, not in kind. The recognition of the difference in degree has now to a great extent also disappeared.

The electric breeze obtained by the silent discharge of high tension electricity.