The calories evolved by the combination of one gram of any substance with its equivalent of another substance being determined, the product obtained by multiplying this number by the equivalent (atomic or molecular weight / valency) of the first element or substance is the thermo-chemical equivalent. If expressed in kilogram calories, the product of the [...]

The heat produced by a unit current passing through a conductor with unit difference of potential at its ends; the heat equivalent of a volt-coulomb or watt-second. It is equal to Gram-degree C.   .24068 Pound-degree F.  .000955

The work or energy equivalent to unit quantities of electric energy, q. v.; or equivalent to a unit current in a conductor whose ends differ one unit of potential. The unit of electric energy taken is the watt-second or volt-coulomb. One volt-coulomb is equal to Ergs                  1E7   [10000000] Foot Pound           .737337 Gram-degree C.       .24068 Horse [...]

The weight of any substance set free by one coulomb of electricity. The following give some equivalents expressed in milligrams: Hydrogen            .0105    Mercury (mercurous)   2.10 Gold                .6877    Iron (ferric)          .1964 Silver             1.134     Iron (ferrous)         .294 Copper (cupric)     .3307    Nickel                 .3098 Mercury (mercuric) 1.05      Zinc                   .3413 Lead               1.0868    Chlorine               .3728 Oxygen              .89

The quotient obtained by dividing the atomic weight of an element by its valency.

A surface bearing the same relation to a magnetic or electro-magnetic field of force that an electrostatic equipotential surface (see Equipotential Surface, Electrostatic,) does to an electrostatic field of force.

A surface in an electrostatic field of force, which is the locus of all points of a given potential in such field; a surface cutting all the lines of force at a point of identical potential. Lines of force are cut perpendicularly by an equipotential surface, or are normal thereto.

Equal in potential; generally applied to surfaces. Thus every magnetic field is assumed to be made up of lines of force and intersecting those lines, surfaces, plane, or more or less curved in contour, can be determined, over all parts of each one of which the magnetic intensity will be identical. Each surface is the [...]

In electro-magnetic mechanism an arrangement for converting the pull of the electro-magnet varying in intensity greatly over its range of action, into a pull of sensibly equal strength throughout. The use of a rocking lever acting as a cam, with leverage varying as the armature approaches or recedes from the magnet core is one method [...]

Initials of Electrical Power Storage; applied to a type of secondary battery made by a company bearing that title.