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acid alternating current ampere angle apparatus applied arc lamp armature body boiler brushes cable called carbon cell Cell.—A charge chemical coil commutator compound condenser conductor connected consisting copper core cylinder device direct current direction discharge dynamo elec electric circuit electric conductor electric current Electric.—A electrodes electrolyte electromagnetic electromotive force electroplating employed energy equal farad field magnet filament flux galvanometer heat incandescent lamp induction instrument insulated iron light lines of force liquid machine magnetic field magnetic force measuring mechanical metal meter motion motor needle operated passing phase piston plate pole potential pressure primary produced pump resistance rheostat rotation screw shaft shunt signal spark steam engine steel substance surface switch Switch.—A switchboard telegraph telephone telephone switchboard temperature term sometimes terminals tion transformer tric tricity trolley tube unit usually valve vibration voltage voltaic voltaic cell waves wheel winding wire zinc
Page 306 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Page 349 - This consists of two wires, one of platinum and the other of an alloy of 90 per cent. platinum and 10 per cent rhodium. These two are fastened together at one end, while the two free ends are carried to a galvanometer which measures the intensity of the current. That portion of the wires which is inserted into the furnace or...
Page 177 - Having the members of several frogs thus dissected, he passed copper hooks through part of the dorsal column which remained above the junction of the thighs, for the convenience of hanging them up till they might be required for the purpose of experiment.
Page 109 - Masonry 4 8 A dead load on a structure is one that is put on by imperceptible degrees, and that remains steady ; such as the weight of the structure itself. A live load is one that is put on suddenly, or is accompanied with vibration ; such as a swift train travelling over a railway bridge, or a force exerted in a moving machine.
Page vii - Give instruction to a wise man, and he will be yet wiser: teach a just man, and he will increase in learning.
Page 34 - The working adhesion of a belt to the pulley will be in proportion both to the number of square inches of belt contact with the surface of the pulley, and also to the arc of the circumference of the pulley touched by the belt. This adhesion forms the basis of all right calculation in ascertaining the width of belt necessary to transmit a given horse-power.
Page 239 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Page 107 - English scientist who discovered the principle involved — states that: The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture— each gas acting as if it alone was present and occupied the total volume.
Page 524 - Points of Application of Voltage. The test voltage shall be successively applied between each electric circuit and all other electric circuits and metal parts grounded.