Salts are decomposed by electrolysis, and in separating they combine to form new molecules.
Saturated. A liquid is said to be saturated when it has dissolved all the salts it will take up.
Search-light. An apparatus for producing a powerful beam of light and projecting it in any desired direction.
Secondary. A term applied to the secondary coil of a transformer or induction-coil.
Secondary Battery. (See [Battery, Secondary].)
Secondary Plates. The plates of a secondary battery or storage-battery. When charged, the negative plate should be brown or deep reddish in color, and the positive slate-colored.
Self-excited. Electrified by its own current.
Self-winding Clock. A clock which automatically winds itself by electricity. It is operated by a small electro-magnetic motor which obtains its current from an outside source.
Semaphore, Electric. An apparatus for exhibiting signals. Used in the railway block system.
Series. Arranged in succession. When incandescent lamps are installed so that the current goes in and out of one lamp, and so on to the next and the succeeding ones, they are said to be arranged in series. It takes high E-M-F and current, or amperage, to operate such lamps.