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Molecular vibrations
156
BOOK REVIEWS
1874. Whereas the old patent law was commonly misunderstood as granting to the patentee "the exclusive right to make, use, and vend the invention," the present law specifically grants "the right to exclude others from making, using, or selling the invention." In a highly compressed form, this book dissects the law and demonstrates, by examples, the workings of the U. S. patent system. Subjects touched are of interest to all potential patentees. These include: what is patentable; patent rights; employeremployee relationships; applications; transfer and assignment of rights; infringements; and record keeping. Especially stressed is the importance of documentation in a form which would be aceptable to a court hearing patent cases and the fact that an individual other than the inventor should himself personally observe, and if possible, carry out, all the steps leading to the invention. Research personnel and administrators should find time to read this book if they are at all interested in inventions and patents. S. CHAIn" PRINCIPLES OF EMULSION TECHNOLOGY, by Paul Becher. 149 pages, illustrations, 12 × 18 cm. New York, Reinhold Publishing Corp., 1955. Price, $2.95. This book is one of the Reinhold Pilot books, and its classification in this manner will immediately tell the interested party that it is a small comprehensive source of information. It is simply written, easily understood and well illustrated. The text consists of eight chapters whose titles are indicative of the information they contain. Namely : (1) Dispersions and Emulsions; (2) Surface Activity; (3) Theory of Emulsions; (4) The Chemistry of Emulsifying Agents; (5) Emulsification Equipment; (6) The Testing of Emulsion Properties; (7) Emulsion Formulation; and (8) Demulsification. It is concluded with General References, the oldest of which is 1941. This text--and others like it--is to be recommended for those persons who are interested in a new field and would like a short, rather complete, simply worded treatise. PHYLLIS A. PARKIN
[J. F. I.
MOLECULAR VIBRATIONS,by E. Bright Wilson, Jr., J. C. Decius and Paul C. Cross. 388 pages, 16 × 24 cm. New York, McGraw-Hill Book Co., Inc., 1955. Price,
$8.50. It is perhaps easiest to describe the scope of this book by saying what it is not, rather than what it is. Its aim is not to review the rapidly developing techniques for the experimental study of infrared and raman spectra. It does not try to summarize, review, or systematize, the vast amount of this type of data now available. Nor does it consider the relationship between molecular vibration, rotation and the calculation of thermodynamic properties of molecules. Finally, molecular vibrations in the liquid or solid state and the corresponding spectra are not treated. The aim is to present the modern theory of the vibrations of isolated, non-interacting (that is, gaseous) molecules as it is used to predict spectra and conversely, as it enables information on molecular architecture to be inferred from observed spectra. To achieve this aim, the authors first present the simpler methods, bypassing much of the detail in favor of simplicity. In later chapters the more complex procedures involving group theory are treated. The arrangement of the book is flexible so that the reader may, if he so desires, skip some of the more specialized material such as that on isotope effects. The reader is assumed to have a basic knowledge of quantum mechanics. But the emphasis is not on the quantum mechanics of molecular vibrations, but on the methods of treating moleculars with many modes of vibration. This, of course, requires the use of advanced mathematics, in particular matrix algebra and group theory. These subjects are introduced and explained where needed, partly in the text and in more detail in the appendices. Several other topics of less direct bearing are given in the appendices. The last chapter on the separation of rotation and vibration might well have been called an appendix, since this material was bypassed in the earlier parts of the book. The body of the book is closed with a sample vibrational analysis for the benzene molecule. E . R . STEPI~E~S
BOOK REVIEWS
1874. Whereas the old patent law was commonly misunderstood as granting to the patentee "the exclusive right to make, use, and vend the invention," the present law specifically grants "the right to exclude others from making, using, or selling the invention." In a highly compressed form, this book dissects the law and demonstrates, by examples, the workings of the U. S. patent system. Subjects touched are of interest to all potential patentees. These include: what is patentable; patent rights; employeremployee relationships; applications; transfer and assignment of rights; infringements; and record keeping. Especially stressed is the importance of documentation in a form which would be aceptable to a court hearing patent cases and the fact that an individual other than the inventor should himself personally observe, and if possible, carry out, all the steps leading to the invention. Research personnel and administrators should find time to read this book if they are at all interested in inventions and patents. S. CHAIn" PRINCIPLES OF EMULSION TECHNOLOGY, by Paul Becher. 149 pages, illustrations, 12 × 18 cm. New York, Reinhold Publishing Corp., 1955. Price, $2.95. This book is one of the Reinhold Pilot books, and its classification in this manner will immediately tell the interested party that it is a small comprehensive source of information. It is simply written, easily understood and well illustrated. The text consists of eight chapters whose titles are indicative of the information they contain. Namely : (1) Dispersions and Emulsions; (2) Surface Activity; (3) Theory of Emulsions; (4) The Chemistry of Emulsifying Agents; (5) Emulsification Equipment; (6) The Testing of Emulsion Properties; (7) Emulsion Formulation; and (8) Demulsification. It is concluded with General References, the oldest of which is 1941. This text--and others like it--is to be recommended for those persons who are interested in a new field and would like a short, rather complete, simply worded treatise. PHYLLIS A. PARKIN
[J. F. I.
MOLECULAR VIBRATIONS,by E. Bright Wilson, Jr., J. C. Decius and Paul C. Cross. 388 pages, 16 × 24 cm. New York, McGraw-Hill Book Co., Inc., 1955. Price,
$8.50. It is perhaps easiest to describe the scope of this book by saying what it is not, rather than what it is. Its aim is not to review the rapidly developing techniques for the experimental study of infrared and raman spectra. It does not try to summarize, review, or systematize, the vast amount of this type of data now available. Nor does it consider the relationship between molecular vibration, rotation and the calculation of thermodynamic properties of molecules. Finally, molecular vibrations in the liquid or solid state and the corresponding spectra are not treated. The aim is to present the modern theory of the vibrations of isolated, non-interacting (that is, gaseous) molecules as it is used to predict spectra and conversely, as it enables information on molecular architecture to be inferred from observed spectra. To achieve this aim, the authors first present the simpler methods, bypassing much of the detail in favor of simplicity. In later chapters the more complex procedures involving group theory are treated. The arrangement of the book is flexible so that the reader may, if he so desires, skip some of the more specialized material such as that on isotope effects. The reader is assumed to have a basic knowledge of quantum mechanics. But the emphasis is not on the quantum mechanics of molecular vibrations, but on the methods of treating moleculars with many modes of vibration. This, of course, requires the use of advanced mathematics, in particular matrix algebra and group theory. These subjects are introduced and explained where needed, partly in the text and in more detail in the appendices. Several other topics of less direct bearing are given in the appendices. The last chapter on the separation of rotation and vibration might well have been called an appendix, since this material was bypassed in the earlier parts of the book. The body of the book is closed with a sample vibrational analysis for the benzene molecule. E . R . STEPI~E~S