Price: 2s. 6d. This book embodies the material of three lectures given in 1933 in the University of London by its distinguished author. It is less a treatise on the kinetic theory than a summary of Professor Knudsen's own researches, but since these are concerned with several fundamental parts of the kinetic theory, the author has been able to make a connected story of the material. The simpler formulas are deduced, whilst the complicated are merely quoted. The apparatus is described and illustrated. The sections deal with the vapor pressure of mercury, evaporation and condensation, molecular flow through tubes, the cosine law, resistance to motion in gases, thermal molecular pressure, molecular heat conduction and coefficient of accommodation, and the absolute manometer. The treatment is clear and attractive, and the book is one which will be read with interest and profit by many kinds of readers.
The equilibrium conditions of the two decomposition reactions of carbonyl sulphide have been further investigated. The reaction leading to carbon dioxide is shown to be peculiarly susceptible to the nature of the vessel wall, and the rate of the reaction has been measured under various conditions. A method has been devised for measuring the rate of the fast reaction leading to carbon mdnoxide, and a number of velocity values have been obtained. The disproportionation of carbon monoxide, considered as a possible side reaction, is shown not to occur in the range of conditions studied.THE thermal decomposition of carbonyl sulphide (COS) into carbon monoxide and sulphur was described by Than
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