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I. The square of the mean deviation D of the combined effect of several random processes releasing an average of x , y , z ⋯ particles per unit time and producing a , b , c ⋯ ion pairs, respectively, per particle, is D 2 = a 2 x + b 2 y + c 2 z + ⋯ , regardless of whether the separate...
The absorption of supersonic waves of frequency 409.6 kc/sec. in mixtures of air and C O 2 at eight relative humidities ranging from 10 percent to 75 percent was measured. The source of the radiation was a quartz crystal oscillator. The receiver was an acoustic radiometer of the torsion vane...
The measurement of the transmission of a piece of colorless fluorite was made by photographic methods and the results are compared with those obtained with a photoelectric cell for the same crystalline plate. The wave-length range covered was between 1240 and 1600A.
The reflection spectrum of quartz, cut perpendicularly to the optic axis, has been previously studied in the region of 9μ. It was felt advisable to repeat this work by using polarized light and a crystal section cut parallel to the optic axis. With the same high resolution spectrometer and a new...
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