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The thermal insulation of samples of three caribou pelts, six other pelts, and one pile fabric was measured in still air and in winds up to about 26 mph. In still air the values, including ambient air layer, ranged from 2.0 clos for the pile fabric to 5.4 clos for the winter caribou. In a 25-mph wind the insulation af…
Previously described fine-particle magnets have been based upon crystal anisotropy; this paper reports permanent-magnet properties derived from the shape anisotropy of substantially elongated single-domain iron particles. The shape anisotropy of these particles overcomes the limitation imposed on the energy of previou…
Abstract The stress relaxation behavior of peroxide and sulphur vulcanized natural rubber has been investigated using a relaxometer of new design. The peroxide vulcanizates do not degrade significantly in vacuo and degrade by an exponential decrease in stress with time in oxygen. The vulcanizates from the two sulfur r…
The magnitude of magnetic anisotropy induced by the magnetic annealing was measured as a function of composition for iron-nickel alloys. It is concluded that the magnitude of the anisotropy is proportional neither to the magnetostriction nor to the saturation magnetization. The origin of this anisotropy, therefore, ca…
The gas evolved from glass at temperatures below the softening point, which is of interest in bake-out problems, is primarily water. The water evolved from unit surface at constant temperature above 300°C is linear with respect to the square root of the time of bake-out. The intercept of the linear plot, which can be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA reversible silver-silver chloride electrode for 95%(volume) methanol-water solutionsE. Lee Purlee and Ernest GeunwaldCite this: J. Phys. Chem. 1955, 59, 10, 1112–1113Publication Date (Print):October 1, 1955Publication History Published online1 May 2002Published inissue 1 O…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Warren DeSorbo; Specific Heat of Graphite at Very Low Temperatures. J. Chem. Phys. 1 October 1955…
Rapid failures of tubing in sour condensate wells have led to an investigation of possible causes of these failures. The presence of hydrogen sulfide points to sulfide stress corrosion cracking as the cause. The effect of untempered martensite was studied as to its bearing on the susceptibility of steel to sulfide str…
In the present paper, studies on the phase diagram and magnetic properties of Fe – Te system are reported. It was found by X-ray and thermal analysis that a number of intermetallic compounds are formed from melt through peritectic reactions, and an eutectoid reaction was seen to occur between two compounds α (ca FeTe…
The self-diffusion of liquid sodium in the temperature range, 98° to 226°, has been studied by the capillary reservoir technique. The data fit the empirical equation, D=1.10×10—3 exp (—2430/RT). The Stokes-Einstein equation gives a good correlation of the self-diffusion and viscosity data. The difference in the self-d…
The frictional adhesion between projectile and target during a ballistic penetration has been measured with a torsion-type Hopkinson bar. The apparatus allows measurement of the torsional adhesion of a spinning projectile during target penetration. By assuming the friction resisting rotation to be equal to that resist…
Tongue-tear tests were made on samples of acetate fabrics, varying certain controlled factors: weave, texture, yarn twist, and yarn structure. An analysis of the resulting experimental data showed certain relationships between these fabric factors and tear strength. A qualitative discussion was made of tearing action—…
The empirically determined values of the parameter Dq, which in transition-metal complexes, measure the influence of the ligands on the metal d-orbitals are interpreted theoretically. A quantitative treatment of ``the magnetic criterion of the bond type,'' is given. Values of Slater-Condon parameters for transition me…
CLOSTRIDIUM OEDEMATIENS n-ANTIGEN 315 3. The viscosity-reducing action is due to a sulphydryl-activated enzyme, which has been named a tropomyosinase, whose action is inhibited by homologous antisera.
It is concluded from torque measurements on single crystals of Alnico 5 that the high coercive force of these crystals depends upon the shape anisotropy of the fine precipitated plates and that the crystal anisotropy of the plates is negligible. The present physical picture of the alloy is that it consists of plates o…
The infrared absorption spectra of fused B 2 O 3 and of a series of soda borate glasses are presented. These spectra were obtained using vacuum‐pressed briquettes of the powdered glass and powdered KBr. The spectrum of fused B 2 O 3 shows quite definitely that this glass does not consist of a completely continuous tri…
The attenuation of ultrasonic waves by conduction electrons is analysed in terms of the free-electron model of a metal. At such low frequencies that the electronic free path is smaller than the wavelength, the result obtained agrees with that found by other authors using simpler concepts, but this agreement breaks dow…
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Se indica la función del tiro en cada etapa de la cocción, su efecto sobre los productos y su relación con otras variables de la combustión. Se comparan el tiro inducido y el tiro forzado. Se fijan las directrices para la cocción de diversos tamaños de tubos de drenaje.