lectric unit is the volt-ampere, often called the watt. (Sec Energy, Electric.)
Adapter. A screw coupling to engage with a different sized screw on each end; one of the uses is to connect incandescent lamps to gas-fixtures.
A. D. C. Abbreviation for Anodic Duration Contraction, q. v.; a term in electro-therapeutics.
Adherence, Electro-magnetic. The adherence between surfaces of iron due to elcctro-magnetic attraction. It has been applied to the driving-wheels of an engine and rail, whose grip is increased by such action. In one method a deep groove was cut around the wheel which was wound with a magnetizing coil. Thus one rim becomes a north and the other a south pole, and the rail completing the circuit acts as the armature. Such an arrangement prevents a wheel from sliding. Electro-magnetic adherence has also been employed to drive friction gear wheels. In one arrangement the two wheels are surrounded by a magnetizing coil, under whose induction each attracts the other, developing high
Old book. Cutting edge about 100 years ago. Good stuff though. The cover of the book has the author's name misspelled as "Slone", should be Sloane.
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