ABSTRACT PARIS Academy of Sciences, December 3 (C.R., 199, 1261–1344). L. LECOBNU: The abacus of Rateau. The graphical method proposed by Rateau in 1897 for steam consumption in a steam

engine is known by experience to give results not more than two or three parts in a thousand hi error. The author shows that the equations on which this graph is founded are mathematically

incompatible and discusses the reasons why, in spite of this fact, the results are so nearly correct. JULIEN COSTANTIN and EMILE MIEGE: The preservation hi a cellar of potato tubers in the

Moroccan Atlas and its effects. GABRIEL BEBTBAND and VIRGIL GHITESCU: The elementary composition of some cultivated plants. Analyses of five cultivated plants are given, special attention

cent. ANDBE MABCHAUD: Continuous fields of convex semi-cones and their integrals. E. G. BABBILLON: Radii of curvature of higher order attached to an analytical function. JEAN LEBAY: The

problems of conformal representation of Helmholtz: the theory of wakes and prows (of ships).-HENBI CABTAN: The problems of Poincare and of Cousin for functions of several complex variables.

G. DEDEBANT, PH. SCHEBE-SCHEWSKY and PH. WEHBLE: A class of natural movements of viscous fluids, characterised by a minimum of power dissipated. The case of the sun. J. CHALOM: The reaction

pump. JEAN VILLEY: The isotropy of the pressure in fluids submitted to very high accelerations. RAYMOND TBEMBLOT: The applications of the heliometer to astronomical photometry. The

instrument described gives an accuracy of the order of one per cent, and requires less time than the usual method. JACQUES SOLOMON: The experimental determination of electronic densities.

MAX BOBN and LEOPOLD INFELD: The principles of the new quantic electrodynamics. SCHMITT: The determinations of the vapour pressures of hydrocarbons. The author uses a static method with

special precautions for eliminating gases from the liquid and from the glass surfaces. Results are given for benzene, n-hexane, methylcyclopentane and toluene. THEODOBE IONESCU and

CONSTANTIN MIHUL: The structure of the ionised layer of the atmosphere (ionosphere). The analysis of the results of experiments on ionised gases indicates that there is no thermal

equilibrium between the electrons and the molecules, and hence the velocities are not distributed according to Maxwell's law. These results have been applied to calculate the reflection

of the electromagnetic waves in the upper regions of the atmosphere. It is concluded that the discontinuities observed experimentally are only apparent and that the true reflection levels

vary continuously. RENE DUBBISAY: The applications of a method of capillary analysis. MLA DEN PAKJ and MLLE. VALEBIA DEUTSCH: The refractometric determination of the seric proteins. W.

SWIETOSLAWSKI and J. SALCEWICZ: A new determination of the esterification constant in the gaseous phase co-existing with the liquid phase. Access through your institution Buy or subscribe

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permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Societies and Academies. _Nature_ 135, 43–44 (1935). https://doi.org/10.1038/135043a0 Download citation * Issue Date: 05 January 1935 * DOI:

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