The Journal of Physical Chemistry, Volume 10

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Cornell University, 1906
 

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Pagina 715 - A physical theory is not an explanation. It is a system of mathematical propositions, deduced from a small number of principles, which aim to represent as simply, as completely, and as exactly as possible a set of experimental laws.
Pagina 750 - THE PHASE RULE AND ITS APPLICATIONS. By ALEX. FINDLAY, MA, Ph.D., D.Sc., Lecturer and Demonstrator in Chemistry, University of Birmingham. With 134 Figures in the Text.
Pagina 125 - I have endeavoured to present the subject of Spectroscopy from the practical side. As full details as possible have been given of the methods of working with the various types of instruments. In the many -branches of Applied Spectroscopy, as distinct from the statistical work, it has been quite impossible to deal with the great number of researches of the present time. Typical investigations have, therefore, been selected, both with the view of indicating the lines upon which present work is being...
Pagina 132 - The present investigation was undertaken in order to obtain a confirmation of Billitzer's results on absolute potentials by the method of deflections of a minute metallic electrode suspended in various solutions, under the influence of an electric current. The results obtained have failed completely to confirm the measurements obtained by him, and we are forced to the conclusion that the method proposed is not to be relied upon for the purpose for which it was developed. This conclusion is further...
Pagina 464 - ... been studied but little. It is known that certain brasses dissolve in the same ratio as the copper and zinc present, while other brasses dissolve differently. Many of the other properties of the useful alloys have been studied in detail, and it is the purpose of this research to study the corroding effects of some of the more common re-agents on the copper-tin series of alloys.
Pagina 238 - The Absorption of Phosphate by Soils: OSWALD SCHREINER and G. H FAILYER. In view of the importance of the subject to a proper understanding of the chemistry of the soil and of soil solutions, a systematic study of the behavior of several soil types toward different phosphates was made. The phosphate solution was percolated through the soil at a slow and constant rate in an apparatus especially designed for this purpose. The separate fractions were then analyzed for phosphate and thus the amount absorbed...
Pagina 236 - Conclusions. 1. Simple ureides exhibit spectra without absorption bands. 2. The linking together of two simple ureides by one or more polyvalent atoms causes a powerful selective absorption, which is destroyed when the rings are disunited by hydrolysis or otherwise. 3. The purin compounds cause the production of bands in their spectra when a CIO group is converted into an ethylenic linking within the ring and a OOH group adjoining it.
Pagina 254 - ... constant rate in an apparatus especially designed for this purpose. The separate fractions were then analyzed for phosphate and thus the amount absorbed by the soil determined. The graphical representation of the results indicates that the soils are approaching a saturated condition for phosphate, as is shown by the fact that each curve is evidently approaching a horizontal asymptote. It has been found that these absorption phenomena are quite accurately described by the differential equation....
Pagina 666 - ... and each dealing with one branch of the subject. The rate of advance in various branches of the subject is not equal ; while, for example, the basis of the science remains comparatively stationary (for methods of determining atomic and molecular weights, and the classification of compounds undergoes little modification), rapid progress is being made in other branches. Hence it has been thought proper to issue several short manuals, so that each individual one may be frequently brought up to date,...
Pagina 208 - In this paper it has been shown that whether osmosis will take place in a given case or not depends upon the specific nature of the septum and the liquids that bathe it; and if osmosis does occur, these factors also determine the direction of the main current and the magnitude of the pressure developed.

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