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The Rideal absorption hygrometer has been studied with a view to its possibilities as a laboratory instrument for the measurement of the hygroscopic condition of gas in small and confined spaces. The theoretical errors due to adsorption of moisture upon the containing walls of the apparatus, and...
A description is given of a simple motor‐driven apparatus for the deposition of built‐up molecular films on plane solid surfaces. Special features of the apparatus are its portability and simplicity of construction, and it is suitable both for lecture demonstrations and for research.
Two types of balance are described for measuring small weights by application of a magnetic force in place of the usual system of calibrated weights. One method is applied to an analytic balance, the other to a vacuum balance.
An electrode for use with an instrument which records data by the firing of a spark through graph paper and a relay circuit which acts to limit the discharge to a single spark are described.
A treatment of the acceleration of particles by the linear resonance accelerator is given, including the calculation of the velocity distribution of particles emergent from the device and a method for improving the yield and the velocity distribution. Calculated curves showing these features are...
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