In medical electricity, the region surrounding the electrode applied to
the human body.

In medical electricity, the region surrounding the polar zone, q. v.

An apparatus used in telegraphy for sending a momentary reverse current
into the line after each signal, thus counteracting retardation.

The terminal connecting with the zinc plate, or its equivalent in an
electric circuit; the negative electrode; the kathode. A term now little
used.

A metal; one of the elements; atomic weight, 65.1;
specific gravity, 6.8 to 7.2.
microhms. Resistance at 0° C. (32° F.), per centimeter cube,   5.626 Resistance at 0° C. (32° F.), per inch cube,         2.215 Relative resistance (silver = 1),                    3.741 ohms. Resistance of a wire, 1 foot long, weighing 1 grain,   [...]

There are three thermometric zeros. In the Réaumur and centigrade
scales, it is at the temperature of melting ice; in the Fahrenheit
scale, it is 32° F. below that temperature, or corresponds to -17.78° C.
The third is the absolute zero. (See Zero, Absolute.)

Conventionally, the potential of the earth. True zero potential could only exist in the surface of a body infinitely distant from other electrified bodies.

From several considerations it is believed that at a certain temperature
the molecules of all bodies would touch each other, their kinetic motion
would cease, and there would be no heat. This temperature is the
absolute zero. It is put at -273° C. (-459° F.)
[Transcriber's note; The modern value is 0° Kelvin,  -273.15° C, or
-459.67° F. The lowest [...]

(a) The origin of any scale of measurement.
(b) An infinitely small quantity or measurement.

A voltaic pile or battery. It is made of discs of paper, silvered or
tinned on one side and sprinkled on the other with binoxide of
manganese. Sometimes as many as 2,000 of such couples are piled up in a
glass tube and pressed together with two rods which form the terminals.
They maintain a high potential difference, but [...]