Forms of equilibrium of crystals
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Irreversible Magnetic Effects of Stress
When Rayleigh's law for small hysteresis loops is interpreted in terms of the elementary process of domain wall displacement, its generalization to include effects of stress becomes possible. In this way theoretical formulas have been derived for the behavior of a soft iron or steel specimen which is first put into a…
Crystal growth and surface structure. Part I
W. K. Burton and N. Cabrera, Discuss. Faraday Soc., 1949, 5, 33 DOI: 10.1039/DF9490500033
583. Organosilicon compounds. Part I. The formation of alkyliodosilanes
C. Eaborn, J. Chem. Soc., 1949, 2755 DOI: 10.1039/JR9490002755
Internal Structure of Granitic Pegmatites
Abstract Studies of strategic mineral deposits in the major domestic pegmatite districts by the U. S. Geological Survey from 1939 to 1945, primarily for the purpose of increasing production of mica, beryllium, lithium, and tantalum minerals, resulted in the clarification of many problems related to the general. featur…
The Refractive Index in Electron Optics and the Principles of Dynamics
In view of mis-statements made in the literature, the origin of the refractive index in electron optics is discussed in some detail, and the uniqueness of an expression previously given is demonstrated. On this basis, some general properties of electron optics are investigated. A relation between ray direction and wav…
The Theoretical Resolution Limit of the Electron Microscope
The resolving power of the electron microscope and the contrast in the image are calculated for different conditions of focusing, illumination and aperture. These conditions can change the limit of resolution by a factor of about 3. The contrast in the image of an atom is appreciably increased by defocusing and spheri…
The influence of dislocations on crystal growth
F. C. Frank, Discuss. Faraday Soc., 1949, 5, 48 DOI: 10.1039/DF9490500048
The theory of the anomalous skin effect in metals
Abstract The problem of metallic conduction at high frequencies and low temperatures, recently discussed by Pippard, is reformulated using the general methods of the theory of metals, and exact solutions are obtained which are valid for all frequencies and temperatures. It is shown that, for large values of the free p…
Statistical Error in Absorption Experiments
In certain exponential absorption experiments, notably measurements of cross sections by transmission, it is important to achieve minimum statistical error in a limited time or to minimize the counting time required to measure the absorption coefficient with a preassigned accuracy. The conditions required to attain th…
TRANSMITTANCE OF NEAR‐INRARED ENERGY BY BINARY GLASSES*
A bstract A study has been made of the transmittance of near‐infrared energy by a number of binary glasses. Of the systems studied, the lithia‐silica and lead oxide‐silica glasses were found to have the highest transmittance of energy in the range of wave lengths from 3.0 to 5.0 microns. The transmittance of lithia‐si…
Mechanics of Elastic Performance of Textile Materials
A technique is developed for the quantitative evaluation of the deformation components of visco-elastic materials when these are subjected to tensile loading, for loads ranging from zero to rupture, under dynamic loading conditions, at constant rates of load, elongation, or strain for different magnitudes of constant…
X-ray studies of halloysite and metahalloysite
Metahalloysite is one of the kaolin group of minerals with a composition approximating to the formuia Al 2 O 3 .2SiO 2 .2H 2 O, and its structure is generally considered to be built of composite layers of atoms of the kind found in other minerals of this group. It differs from them most strikingly in that it can be pr…
Electron Bombardment Conductivity in Diamond
A study has been made of electron bombardment conductivity in diamond using primary electrons of energies up to 14,000 ev. An alternating field method is used which reduces or eliminates the effects of internal space charge fields. Data on internal yields as a function of crystal field are given for both electron and…
Equilibria in Hydrogenation of Esters and of Indoles
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibria in Hydrogenation of Esters and of IndolesHomer Adkins and Robert E. Burks Jr.Cite this: J. Am. Chem. Soc. 1948, 70, 12, 4174–4177Publication Date (Print):December 1, 1948Publication History Published online1 May 2002Published inissue 1 December 1948https://pubs.ac…
X-ray studies of halloysite and metahalloysite
The experiments described below on the dehydration of halloysite were largely carried out in the laboratoire Central des Services Chimiques de l'État, Paris, where we enjoyed not only the excellent facilities of the laboratory but also the advice of Monsieur J. Méring and Mile R. Glaser who had made similar studies of…
Synthesis of Alkoxymethyltrimethylsilanes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of AlkoxymethyltrimethylsilanesJohn L. SpeierCite this: J. Am. Chem. Soc. 1948, 70, 12, 4142–4143Publication Date (Print):December 1, 1948Publication History Published online1 May 2002Published inissue 1 December 1948https://pubs.acs.org/doi/10.1021/ja01192a049http…
The crystal structure of zirconium oxysulfide, ZrOS
The crystal structure of ZrOS has been investigated by means of X-ray powder photographs and by powder spectrometry. The substance has a simple cubic lattice with a0 = 5.696 ± 0.002 A. (λ = 1.5418 A.) with space group T4–P213. In the resulting structure Zr shows a co-ordination number of seven, being surrounded by thr…
The Chemistry of Spiropyrans.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Chemistry of Spiropyrans.Ahmed. MustafaCite this: Chem. Rev. 1948, 43, 3, 509–523Publication Date (Print):December 1, 1948Publication History Published online1 May 2002Published inissue 1 December 1948https://pubs.acs.org/doi/10.1021/cr60136a004https://doi.org/10.1021/cr…
Polar-Type Rust Inhibitors
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolar-Type Rust InhibitorsH. R. Baker and W. A. ZismanCite this: Ind. Eng. Chem. 1948, 40, 12, 2338–2347Publication Date (Print):December 1, 1948Publication History Published online1 May 2002Published inissue 1 December 1948https://pubs.acs.org/doi/10.1021/ie50468a024https:/…