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A microscope stage has been designed and constructed that permits microscopic observation of small particle specimens in the temperature range from room temperature to about 1200°C. Higher temperatures can be obtained with minor changes. The constructed stage contains four independent furnaces...
A resistor thermometer element is described consisting of a nickel or palladium film protected by an SiO or didymium fluoride coating. The films are vacuum deposited on a glass substrate with imbedded Kovar contacts. The element is capable of withstanding accelerations up to 100 000 G. It is...
Accurate and convenient microwave cavity wavemeters are described that are suitable for many precise physical measurements. High Q 's were attained by refined construction techniques. At 9000 Mc a precision of 0.02 Mc was obtained. The absolute accuracy also may be very high after strains in the...
The infrared absorption spectra of NaNO 2 and LiNO 3 in both the solid and liquid phase have been obtained by two methods. In one case the salt is supported in the interstices of a fine mesh platinum screen, and in the other case the measurements were made in a reflectance cell.
For Raman spectroscopy of gases, intense illumination is required. The relatively low tensile strength of transparent materials has always severely limited such studies at high pressures. This paper describes a method by which use is made of the very high compressional strength of glass. The...
A description is given of a slide rule of special design for use with the method of exact fractions in interferometry. The instrument computes lengths from measured excess fraction orders.
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