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A circuit is described which is operated by impulses and in which the reading of a meter is a function of the rate of the impulses. In the present instance the impulses operate a Weston Model 30 Galvanometer Relay whose contacts discharge a condenser. The condenser is charged up again through a...
A quantitative method of mapping a series of equipotential lines corresponding to definite fractions of the total voltage drop between electrodes is described. The accuracy of the method is tested by mapping several known fields, such as the field between concentric cylinders and that between...
A description is given of a simple type of vacuum prebaking‐furnace which has proved to be both economical and serviceable. The design embodies the experience of several laboratories with such furnaces so that most of the troublesome features and unnecessary complications have been eliminated....
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