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A feature of the method described is that it involves neither temperature nor heat‐flow measurements. The procedure consists merely of taking a stop‐watch reading (over a few minutes) and finding a value on a calibration chart. The two flat ends of a cylindrical sample, about 18 mm in...
The development of an arc‐image system for crystal growth, and techniques for obtaining continuous growth of single crystals under controlled atmospheres, are described. Crystals grown include rutile, sapphire, ruby, stabilized zirconia, and ferrites.
A compact gas high pressure cell for measuring the optical properties of solids at low temperatures under pressures up to 10 kilobars is described. Using helium gas as the pressure‐transmitting medium, the pressure is purely hydrostatic at 78°K and nearly hydrostatic at 7–12°K. Techniques...
A sandwich technique is described for fabricating polystyrene‐silica replicas for repeated examination of a selected area of a specimen in the electron microscope. Electron micrographs of these repetitive replicas are presented. The technique includes a method for manipulating the specimen grid...
An apparatus is described for the determination of Young's modulus from thin‐rod resonance behavior. The apparatus differs from previously described equipment in that it is capable of operating at temperatures over 2000°C while providing a vacuum or an inert atmosphere around the sample. The...
A device is described which can be used to weld tungsten, tantalum, and molybdenum. The general problem of fabricating tantalum process equipment from tantalum sheet is discussed.
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