Electricity in Electro-therapeutics

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W. J. Johnston Company, 1896 - Electrotherapeutics - 402 pages
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Page 309 - EMF that is proportional to the ratio of the number of turns in the secondary coil to the number of turns in the primary.
Page 347 - So far as it is at present known no current can pass through such a mass of materials as that of which the human body is composed without effecting electrolytic decomposition, or, in other words, the only medium of conduction in such a mass is chemical decomposition or electrolysis. It does not matter whether it is a...
Page 214 - The authors conclude that the human organism is in no wise appreciably affected by the most powerful magnets known to modern science ; that neither direct nor reversed magnetism exerts any perceptible influence upon the iron contained in the blood, upon the circulation, upon ciliary or protoplasmic movements, upon sensory or motor nerves, or upon the brain.
Page 70 - ... set d(p/y)/dx = 0, which yields x = 8.28, and p/y = — 5.827 m of fluid flowing. The minimum point occurs where the slopes of the pipe and of the hydraulic grade line are equal. 10.4 PIPES IN SERIES When two pipes of different sizes or roughnesses are connected so that fluid flows through one pipe and then through the other, they are said to be connected in series. A typical series-pipe problem, in which the head H may be desired for a given discharge or the discharge wanted for a given H, is...
Page 359 - When an electric current is sent through a porous septum separating either two different liquids, or two portions of the same liquid, some of the liquid is transported bodily through the septum, almost always in the direction of the electric current ; that is to say, from the positive pole or anode toward the negative pole or cathode.
Page 122 - A convenient unit of work is the foot-pound, or the amount of work done when one pound is raised, against the force of gravity, through a vertical distance of one foot.
Page 347 - Owing, however, to the feeble electric conductivity of the materials in the body, this skin effect, or tendency of the current to seek the outer layers to the exclusion of the inner layers, is comparatively small at the frequencies which can be practically produced, for, while the depth to which such currents would penetrate in good conductors, such as copper wires, is very small, yet in the case of comparatively high resisting materials, such as those constituting the human body, the penetration...
Page 52 - On charging the cell, that is, on sending a current through it in the opposite direction to that of the current...
Page 451 - ... of which the separate volumes treat. The reputation of the authors and their recognized abilities as writers, are a sufficient guarantee for the accuracy and reliability of the statements contained. The entire issue, though published in a series of ten volumes, is nevertheless so prepared that each book is complete in itself and can be understood independently of the others. The volumes are profusely illustrated, printed on a superior quality of paper, and handsomely bound in covers of a special...
Page 107 - Figure 80 shows the electromotive force produced by a continuous current dynamo. Here the line AB is parallel to the base, as before, but instead of being straight, is a fine wavy line. These little waves represent variations in the quantity of electromotive force produced every time that the bar of the commutator passes underneath the electric brush. These wavelets exist in the electromotive force of every continuous current dynamo.

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