The Institute of Physics ( IOP ) по журналам "Proceedings of the Physical Society of London"
Отображаемые элементы 1-20 из 1572
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(1911-12-01)The author described and exhibited a small 2,000-frequency alternator which he had designed and had constructed for testing purposes, mainly in connection with telephonic measurements. The alternator is of the salient pole ...
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(1911-12-01)A balance method is described for accurately comparing quantities of radium by their -radiation, in which the ionisation due to the -rays is balanced against the constant ionisation due to uranium oxide. By observing the ...
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(1920-12-01)A new method of using the quadrant electrometer for the measurement of electrical power is described. It involves the use of a potential divider across the supply circuit, and a standard non-inductive resistance in series ...
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(1918-12-01)The Paper urges the general use of the new scales of pressure and temperature which have been adopted by meteorologists. In the pressure scale the fundamental unit is the bar, the pressure due to a million dynes per square ...
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(1923-01-01)
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(1920-12-01)Various elements were deposited in a pure condition on the cathode in an electric discharge tube. To obtain a clean surface of the element, the latter was distilled in vacuum. An electric discharge was passed through ...
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(1919-12-01)The Paper describes a method of showing that absorption of nitrogen takes place in the discharge tube when sodium and potassium are used as the electrodes. The amount of gas absorbed for different quantities of electricity ...
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(1919-12-01)The instrument, devised for bacteriological use, had to be cheap and moderately robust. It consists of a long horizontal fibre joining the lower ends of two vertical beams, each pivoted very little above its centre of mass. ...
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(1916-12-01)The principal feature of the author's arrangement is the employment of a "slave" clock to do the great part of the work, leaving the master pendulum no function beyond that of controlling the rate of the other. The master ...
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(1912-12-01)The conditions of fixture of the ends of columns, and the large influence this has upon their strength, generally make it necessary to use special testing machines for these members, in which the end plates applying the ...
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(1919-12-01)A simple method of testing diode valves for passing no reverse current at voltages up to 20,000 is described. The anode of a standard valve, known to pass no reverse current, is connected to that of the valve under test, ...
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(1924-01-01)A simple explanation is proposed of absorption, residual charge, and allied phenomena, in solid dielectrics. In accordance with classical theory, the dielectric is assumed to possess a certain true capacity, defined by its ...
Отображаемые элементы 1-20 из 1572