INDEX OF TERMS.

Ampère-hour.—A current of one ampère strength for one hour.
Current, Continuous.—The flow of electricity in one direction.
Current, Alternating.—The intermittent flow in two directions.
Conductor.—The wire through which the current passes.
Circuit, Primary.—With transformers, the conductor or leads attached to the dynamo.
Circuit, Secondary.—With transformers, the conductor from the transformer to the lamps.
C. P.—Abbreviation of Candle-power.
E. M. F.—Abbreviation of Electro-motive force.
Life of Incandescent Lamps.—The duration of the filament which produces the light.
Potential.—Difference of E. M. F., or High and Low-Tension.
See also Glossary, or Explanation of Terms, [page 107].