182. Submarine Cables, with the surrounding water, act like condensers, the result being that the condensing effect slows up the electric current and retards the signals. These make a condenser of enormous capacity. The wires inside form one conductor, and the water the other, while the insulation around the wires forms the dielectric.
EXPERIMENT 84. To study the condensation of electrification.
Apparatus. Same as in last experiment, but arrange so that F B and I T shall be near each other at one side; that is, so that the edge of E S shall be even with the edges of the two tins.
183. Directions. (A) Pass good sparks to I T from the charged E C until something happens. Watch the side where I T and F B are near each other.
184. Discussion. We may say that the electrification was condensed, in this experiment, until the charge became so great that the condenser suddenly discharged itself. Condensers may be made in many ways, but they all consist of 2 conductors, with a dielectric between them. One conductor is insulated, and receives the charge; the other conductor is grounded.
EXPERIMENT 85. To study the action of the condenser.
Apparatus. [Fig. 53]. The insulating table, I T; ebonite sheet, E S (No. 27); flat box, F B, complete (Nos. 40, 41); the electrophorus ([Exp. 68]). Note that this is really the same apparatus as that just used; both conductors of this condenser, however, are insulated and reversed in position.