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The mathematical principles of the classical iterative method of solving linear simultaneous equations are discussed. Basic electrical circuits for setting up an analog of the mathematical relations are given, and a commercial model of a 12‐equation computer is briefly described. The results of...
A method applicable to determining droplet sizes in the interior of an already existing atmosphere of fog or mist is developed and described. The method makes use of the fact that if droplets strike a suitably coated surface without wetting the surface, a track of the contact area is formed. A...
Small droplets of the suspension to be examined are deposited from a mist upon a specimen film whose surface has been treated to promote wetting by the droplets. This procedure makes the entire residue left by a whole droplet available for examination and promotes uniform dispersion of the deposit.
A general method of calculating the temperature rise in multiconductor rubber insulated electric cables based upon the thermal constants of the cable has been derived. The predictions of the theory have been verified experimentally for a number of cables and values of the thermal resistivity...
The solutions of Hallén's integral equation for the cylindrical antenna given by Hallén, Bouwkamp, Gray, King and Middleton are compared. Comparison is also made with the transmission‐line theory of Schelkunoff and with experiment.
A new electrolytic selenium photo‐cell is described and its characteristics given as a function of operating voltage, temperature, external resistance, and time. Data are included indicative of its response to unmodulated, modulated, and monochromatic light; comparison is made with cells of...
The corrections for Lorentz and polarization factors for trial and error crystal structure computations are discussed, following the general method recently presented for correcting x‐ray diffraction data used in Fourier syntheses. The Lorentz correction has the form (1∕ S ) csc y, where S is...
In using lumped resistance‐capacitance circuits for studying heat conduction problems the influence of number and size of lumps is important. Several methods of lumping are conceivable for representation of cylindrical or spherical bodies and results of comparative tests show that equal...
The experimental methods are described by which rectangular blocks are subjected to two‐dimensional compressional stresses and at the same time flow is maintained two‐dimensional with deviations of less than one percent. Within this range of flow a rather wide range of stress conditions is...
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