A protective device for guarding the human body against destructive or
injurious electric shocks. In one system, Delany’s, the wrists and
ankles are encircled by conducting bands which by wires running along
the arms, back and legs are connected. A discharge it is assumed
received by the hands will thus be short circuited around the body and
its vital organs. [...]

A lightning arrester, q. v., comprising two toothed plates nearly
touching each other.

Too great exposure to the voltaic arc in its more powerful forms causes
symptoms resembling those of sunstroke. The skin is sometimes affected
to such a degree as to come off after a few days. The throat, forehead
and face suffer pains and the eyes are irritated. These effects only
follow exposure to very intense sources of light, or [...]

In general terms the arms of a Wheatstone bridge
whose proportion has to be known to complete the measurement. There is a
different system of naming them. Some designate by this title the two
arms in parallel with each other branching at and running from one end
of the bridge to the two galvanometer connections. In the cut of [...]

A small sphere, coated with gold-leaf or other conductor, and mounted on
an insulated handle. It is used instead of a proof-plane, for testing
bodies whose curvature is small.

A small conductor, usually disc shaped, carried at the end of an
insulating handle. It is used to collect electricity by contact, from
objects electrostatically charged. The charge it has received is then
measured (see Torsion Balance) or otherwise tested. (See Prime
Conductor.)

A device for measuring the power applied to a rotating shaft. It
consists of a clamping device to be applied more or less rigidly to the
shaft or to a pulley upon it. To the clamp is attached a lever carrying
a weight. The cut shows a simple arrangement, the shaft A carries a
pulley B to which the [...]

The power of projecting its lines of force straight out from the poles.
This is really a matter of magnetic power, rather than of shape of the
magnet. In electromagnets the custom was followed by making them long to
get this effect. Such length was really useful in the regard of getting
room for a sufficient number of ampere [...]

A surgeon’s probe, designed to indicate by the closing of an electric
circuit the presence of a bullet or metallic body in the body of a
patient.
Two insulated wires are carried to the end where their ends are exposed,
still insulated from each other. In probing a wound for a bullet if the
two ends touch it the circuit [...]

A metal or metal coated sphere or cylinder or other solid with rounded
ends mounted on insulating supports and used to collect electricity as
generated by a frictional electric machine.
According to whether the prime conductor or the cushions are grounded
positive or negative electricity is taken from the ungrounded part.
Generally the cushions are grounded, and the prime conductor [...]