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Handbook of chemistry
178
BOOK REVIEWS.
[J. F. I.
of elements, atomic numbers, and atomic structure which formerly began in about the middle of the text has been almost completely rewritten and now precedes the series of chapters dealing with electrolytic solution phenomena. The latter have also been changed to bring them into line with a modern approach to the subject. The latter portion of the book dealing with metals has been made consistant with recent knowledge, in each chapter the important physical and chemical properties of the metals are summarized in tabular form. There are 52 chapters in all and with an appendix containing helpful tabular information. At the end is a subject index. The work is truly one worthy to bear the name of Smith's College Chemistry. R. H. OPPERMANN. HANDBOOK OF CHEMISTRY, compiled and edited by Norbert Adolph Lange. 2082 pages, 13 × 20 cms. Sandusky, Handbook Publishers, Inc., 1946. Price $%00. This is the sixth edition of a well known and useful work. The material it contains is revised and changed but the size of this one volume handbook remains about the same as the previous edition. Perhaps the most important change in this edition is the completely revised and enlarged table of physical constants of inorganic compounds. This table has been increased to include 2603 compounds with a corresponding list of more than 1300 synonyms. For the first time, wherever possible, data on the refractive index have been included in this table. Other tables have been revised and others added, including Heat and Free Energy of Formation of Compounds, Ionization Constants of Acids and Bases, Electromotive Series of Metals and Alloys, Critical Constants of Gases, Factors for Reducing Gas Volumes to Normal Temperature and Pressure, True Capacity of Glass Vessels. R. H. OPPERMANN. Q
BEAMS ON ELASTIC FOUNDATION,by M. Hetenyi. 255 pages, illustrations, 18 X 26 cms. Ann Arbor, The University of Michigan Press, 1946. Price $4.50. There are many developments of interest to research workers and engineers about which little if anything has been published, with regard to beams on elastic foundation where the pressure in the foundation is proportional at every point to the deflection of the beam at that point and independent of the pressure or deflection occurring in other parts of the foundation. This book is presented as a mathematical analysis covering various forms of the elastically supported beam and including the development of new solutions and new cases of loading, material which has not been published before. The work starts with general solutions of the elastic line where two different methods are presented, both aiming to determine the integration constants from prescribed end conditions of the elastic line. I t is shown that the main difficulty in applying the general solution to particular problems arises in the determination of the integration constants which involved a considerable amount of work. The method of superposition is suggested as a means of avoiding these difficulties. T h e advantage lies in the fact that the determination of the integration constants for a beam of unlimited length (an infinitely long beam) is very simple and that the equation of the deflection llne for any loading can be obtained in a concise form. This treatment leads into the derivation of such deflection formulas and the demonstration that by superposing the formulas obtained for the infinitely long beam, solutions can be derived for beams of any length and with any loading and end conditions. This is followed by listing ready formulas for a number of simple cases of loading on beams of finite length, derived by the method of superposition. Subsequent topics are beams of variable flexural rigidity and variable modulus of foundation, straight bars under simultaneous axial and transverse loading, elastic stability of straight bars, torsion of bars, circular arches, and finally continuity in the foundation. The last topic, involving cases in which the supporting body is an elastic continuum, inchgdes a discussion of foundation layers. The work is rigorous, comprehensive and complete. R. H. OPPERMANN.
BOOK REVIEWS.
[J. F. I.
of elements, atomic numbers, and atomic structure which formerly began in about the middle of the text has been almost completely rewritten and now precedes the series of chapters dealing with electrolytic solution phenomena. The latter have also been changed to bring them into line with a modern approach to the subject. The latter portion of the book dealing with metals has been made consistant with recent knowledge, in each chapter the important physical and chemical properties of the metals are summarized in tabular form. There are 52 chapters in all and with an appendix containing helpful tabular information. At the end is a subject index. The work is truly one worthy to bear the name of Smith's College Chemistry. R. H. OPPERMANN. HANDBOOK OF CHEMISTRY, compiled and edited by Norbert Adolph Lange. 2082 pages, 13 × 20 cms. Sandusky, Handbook Publishers, Inc., 1946. Price $%00. This is the sixth edition of a well known and useful work. The material it contains is revised and changed but the size of this one volume handbook remains about the same as the previous edition. Perhaps the most important change in this edition is the completely revised and enlarged table of physical constants of inorganic compounds. This table has been increased to include 2603 compounds with a corresponding list of more than 1300 synonyms. For the first time, wherever possible, data on the refractive index have been included in this table. Other tables have been revised and others added, including Heat and Free Energy of Formation of Compounds, Ionization Constants of Acids and Bases, Electromotive Series of Metals and Alloys, Critical Constants of Gases, Factors for Reducing Gas Volumes to Normal Temperature and Pressure, True Capacity of Glass Vessels. R. H. OPPERMANN. Q
BEAMS ON ELASTIC FOUNDATION,by M. Hetenyi. 255 pages, illustrations, 18 X 26 cms. Ann Arbor, The University of Michigan Press, 1946. Price $4.50. There are many developments of interest to research workers and engineers about which little if anything has been published, with regard to beams on elastic foundation where the pressure in the foundation is proportional at every point to the deflection of the beam at that point and independent of the pressure or deflection occurring in other parts of the foundation. This book is presented as a mathematical analysis covering various forms of the elastically supported beam and including the development of new solutions and new cases of loading, material which has not been published before. The work starts with general solutions of the elastic line where two different methods are presented, both aiming to determine the integration constants from prescribed end conditions of the elastic line. I t is shown that the main difficulty in applying the general solution to particular problems arises in the determination of the integration constants which involved a considerable amount of work. The method of superposition is suggested as a means of avoiding these difficulties. T h e advantage lies in the fact that the determination of the integration constants for a beam of unlimited length (an infinitely long beam) is very simple and that the equation of the deflection llne for any loading can be obtained in a concise form. This treatment leads into the derivation of such deflection formulas and the demonstration that by superposing the formulas obtained for the infinitely long beam, solutions can be derived for beams of any length and with any loading and end conditions. This is followed by listing ready formulas for a number of simple cases of loading on beams of finite length, derived by the method of superposition. Subsequent topics are beams of variable flexural rigidity and variable modulus of foundation, straight bars under simultaneous axial and transverse loading, elastic stability of straight bars, torsion of bars, circular arches, and finally continuity in the foundation. The last topic, involving cases in which the supporting body is an elastic continuum, inchgdes a discussion of foundation layers. The work is rigorous, comprehensive and complete. R. H. OPPERMANN.