Word: ohm
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Dates: during 1890-1899
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Professor Trowbridge has discovered that a flash of lightning travelling through two miles of air meets with no more resistance than a flash going through two feet of air. This discovery practically reverses Ohm's Law, that the resistance which a current overcomes is proportionate to the distance traversed, in its bearing upon air as a conductor. The law still holds with regard to other conductors such as copper wire...
...with a Crooke's tube. The first attempt, made a few minutes before, was partly successful. The ordinary sixty-volt alternating current used for lighting the building was sent through the primary of an ordinary coil. The resistance of the primary of this coil is one-tenth of an ohm, and of the secondary 6000 ohms. The current through the primary was not stronger than 15 ampheres. The current from the secondary of the first coil was sent through the primary of 25 turns of a Tesla induction coil, the secondary of which has 500 turns. The secondary will give...