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alternating currents amperes apparatus armature arranged attraction axis battery bobbins brass brush cable candles carbon causes cell centimetres charge clamp coating commutator conductor connected consists constructed copper wire current flows cylinder difference of potential direction disc discharge distance earth effect electric current electrified electro-magnet electrode electrolysis electromotive force element energy fastened galvanic galvanometer glass glow Gramme Gramme machine gutta-percha heat increased induced currents induction coil inserted instrument insulated iron core lamp lead lever Leyden jar lines of force machine magnetised means mercury metal metres microphone millimetres motion motor movable move needle negative electricity obtained Ohm's law opposite outer circuit piece placed platinum polarisation portion position produced quantity regulated resistance ring rotation screw secondary selenium shown in Fig Siemens solenoid spark spring station strength of current sulphate sulphuric acid surface telegraph telephone tricity tube vessel vibrations wheel
Page 792 - ... one of the most useful as well as one of the most eminent traits in the human character.
Page 845 - ... of business; it has enabled man to descend to the depths of the sea, to soar into the air, to penetrate securely into the noxious recesses of the earth, to traverse the land in cars which whirl along without horses, and the ocean in ships which run ten knots an hour against the wind.
Page 217 - The extraordinary noise caused by the horses' hoofs makes the fish issue from the mud, and excites them to combat. These yellowish and livid eels, resembling large aquatic serpents, swim on the surface of the water, and crowd under the bellies of the horses and mules. A contest between animals of so different an organization furnishes a very striking spectacle.