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Circuit theory; current in any network; expansion of fundamental integral in Bessel's series. This is treated quite fully, and is shown to be applicable to circuits with either lumped or distributed impedances. If the upper limit for the roots of the equation for the impedance function is known,...
New Quadrant electrometer of high sensitivity, with tilted needle and movable quadrants. Principle . If the needle is given a slight tilt about its long axis and one pair of quadrants is raised or lowered a small distance with respect to the other pair, electrical control forces are set up which...
Speed of sound pulses in short tubes placed near a spark source; measured by the photographic method. By a modification of this method, an instantaneous photograph was obtained of a sound pulse, part of which had come through a tube, while another part had come through free air. In this way the...
Temperature distribution in solids; surface heated at uniform rate. Equations are derived for the following typical shapes: (1) Rectangular parallelopiped. (1a) Long rectangular rod. (1b) Very thin slab. (2) Cylinder. (2a) Long cylindrical rod. (3) Sphere. (4a) Cylindrical tube heated only...
X-ray Spectrum, L-series; Wave-lengths .—Dershem's results were verified, for the most part within 1/10 per cent., except in the case of 1.777 × 10 - 8 cm. which was found to have a wave-length of 1.202 × 10 - 8 cm. Six new lines were discovered, four of which may belong to tungsten: 1.236,...
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