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National advisory committee for aeronautics
270
BOOK
REVIEWS.
[J. F. I.
familiarity with elementary electrical theory is assumed, but an excellent &sum6 which precedes the development of the subject provides the reader with a valuable introductory review which, while thoroughly modern, is in conformity with current practice. The work is in three divisions with an appendix. In Part I, Theoretical Basis of Radio Measurements, are discussed the fundamentals of electromagnetism, the principles of alternating currents, radio circuits and damping. Part II, Instruments and Methods of Radio Measurements, contains a description and analysis of wave meters, condensers, coils, current measurement, resistance measurement and sources of high-frequency current. Part III, Formulas and Data, deals with the calculation of capacity, calculation of inductance, design of inductance coils, high-frequency resistance and miscellaneous formulas and data. The appendix, in three parts, contains an account of the radio work of the bureau, a bibliography and a list of the symbols used. Those who are acquainted with the high order of merit of the publications of the Bureau of Standards will not be disappointed in this timely work on the L. E. P. quantitative features of a subject of widespread interest. A LABORATORY MANUEL OF MACHINE SHOP PRACTICE. By Jerry I% Service, B. S. in E. E., Dean of Trade and Engineering Schools, the Youngsto\vn Institute of Technology, and George E. Frease, Instructor of Shop Practice, the Youngstown Institute of Technology. xii-106 pages, illustrations, 5” x S”, cloth. New York, D. Van Nostrand Company, 1924. Price, $1.25 net. As indicated by the title, this is a laboratory manual of machine shop exercises which are designed to illustrate the application of various fundamental operations. Ample directions are given for carrying out each exercise with numerous helpful suggestions as to the best mode of procedure. The exercises, which are illustrated, cover the essential operations of bench work, the drill press, engine lathe, milling machine and planer and shaper. The absence of any reference to the use of the surface-plate and scraping to fit is a somewhat notable omission. Doubtless the authors have good reasons for not including an exercise in this essential to an accurate sliding fit. A book of this kind should prove of value in the shop work of an engineering course as well as in vocational training. L. E. P. NATIONAL ADVISORYCOMMITTEEFOR AERONAUTICS. Report No. 208, Determination of Turning Characteristics of an Airship by Means of a Camera Obscura. By J. W. Crowley, Jr., and R. G. Freeman. 8 pages, illustrations, quarto. Washington, Government Printing Office, 19-35. Price, ten cents This investigation was carried out by the Committee at Langley Field for the purpose of determining the adaptability of the camera obscura to the securing of turning characteristics of airships, and also of obtaining some of those characteristics of the C-7 airship. The method consisted in flying the airship in circling flight over a camera obscura and photographing it at known time intervals. The results show that the method used is highly satisfactory and that for the particular maneuver employed the turning diameter is 1240 feet,
Aug., 1925.1
J?UBLICATIONS
RECEIVED.
271
corresponding to a turning coefficient of 6.4, and that the position of zero angle of yaw is at the nose of the airship. By A. F. Zahm. Report No. 212, Stability Equations for Airship Hulls. 5 pages, illustrations, quarto. Washington, Government Printing Office, 1925. Price, five cents. The report includes simple form& for determining, directly from the data of wind-tunnel tests of a model of an airship hull, what shall be the approximate character of oscillation, in pitch or yaw, of the full-scale ship when slightly disturbed from steady forward motion.
PUBLICATIONS
RECEIVED.
Physics in Industry. Lectures delivered before the Institute of Physics, by J. W. Mellor, A. E. Onley, and C. H. Desch, with a foreword by the Hon. Sir Charles A. Parsons. Vol. II, 48 pages, illustrations, plates, 8~0. Oxford University Press, 1924. Price, $1. Companion to the First Edition of Chelndcal Synonyms and Trade Names, by William Gardner. 55 pages, 8~0. London, Crosby Lockwood and Son, 1925. Price, 7 shillings, 6 pence. The Animal a.s a Converter of Matter a& Energy. A study of the rBle of livestock in food production, by Henry Prentiss Armsby, and C. Robert Moulton. American Chemical Society Monograph Series. 236 pages, illustrations, 8vo. New York, The Chemical Catalog Company, 1925. Price, $3. A Text-book of Inorganic Chemistry, edited by J. Newton Friend. Vol. 3, part I, The Alkaline Earth Metals, by May Sybil Burr. xxvi-346 pages, figures, tables, Svo. London, Charles Griffin and Company, 1925. A c&perative effort by a group of A Treatise on Physical Chemistry. physical chemists. Edited by Hugh S. Taylor, D.Sc. Second printing-corrected. 2 vols., illustrations, 8vo. New York, D. Van Nostrand Company, 1925. Syndicat de la Presse Technique Inda&uieZle, Commrciale et Agricole de France. Programme, rer Congres International, September, 1925. 112 pages, portraits, quarto. Paris, Syndicat, 1925. The Physical Chemistry of Igneous Rock Formation. A General Discussion held by the Faraday Society, the Geological Society, and the Mineralogical Society, October, 1924. g3 pages, illustrations, figures, tables, 8~0. London, Faraday Society. Price, 6 shillings, 6 pence. The Crystal&e State, by Sir William Henry Bragg. The Romanes Lecture delivered in the Examination Schools, 20 May, 1925. 31 pages, illustrations, 8~0. Oxford, Clarendon Press, 1925. -Price, seventy cents. Electricity and the Structure of Matter, by L. Southerns. 128 pages, illustrations, r2mo. London, Oxford University Press, 1925. Price, $I. Introduction GPomPtrique a la MCca+ziqw Ratiouelle, by Charles Cailler. xii-628 pages, figures, 8vo. Paris, Gauthier-Villars et Cie., 1924. Price, 40 francs. United States Department of Commerce: Elimination of Waste: Simplified Practice Recommendation, No. 23, Plow Bolts. IO pages, illustrations, tables, Svo. No. 25, Hot-water Storage Tanks. IO pages, illustrations, tables, 8vo. Washington, Government Printing Office, 1925.
BOOK
REVIEWS.
[J. F. I.
familiarity with elementary electrical theory is assumed, but an excellent &sum6 which precedes the development of the subject provides the reader with a valuable introductory review which, while thoroughly modern, is in conformity with current practice. The work is in three divisions with an appendix. In Part I, Theoretical Basis of Radio Measurements, are discussed the fundamentals of electromagnetism, the principles of alternating currents, radio circuits and damping. Part II, Instruments and Methods of Radio Measurements, contains a description and analysis of wave meters, condensers, coils, current measurement, resistance measurement and sources of high-frequency current. Part III, Formulas and Data, deals with the calculation of capacity, calculation of inductance, design of inductance coils, high-frequency resistance and miscellaneous formulas and data. The appendix, in three parts, contains an account of the radio work of the bureau, a bibliography and a list of the symbols used. Those who are acquainted with the high order of merit of the publications of the Bureau of Standards will not be disappointed in this timely work on the L. E. P. quantitative features of a subject of widespread interest. A LABORATORY MANUEL OF MACHINE SHOP PRACTICE. By Jerry I% Service, B. S. in E. E., Dean of Trade and Engineering Schools, the Youngsto\vn Institute of Technology, and George E. Frease, Instructor of Shop Practice, the Youngstown Institute of Technology. xii-106 pages, illustrations, 5” x S”, cloth. New York, D. Van Nostrand Company, 1924. Price, $1.25 net. As indicated by the title, this is a laboratory manual of machine shop exercises which are designed to illustrate the application of various fundamental operations. Ample directions are given for carrying out each exercise with numerous helpful suggestions as to the best mode of procedure. The exercises, which are illustrated, cover the essential operations of bench work, the drill press, engine lathe, milling machine and planer and shaper. The absence of any reference to the use of the surface-plate and scraping to fit is a somewhat notable omission. Doubtless the authors have good reasons for not including an exercise in this essential to an accurate sliding fit. A book of this kind should prove of value in the shop work of an engineering course as well as in vocational training. L. E. P. NATIONAL ADVISORYCOMMITTEEFOR AERONAUTICS. Report No. 208, Determination of Turning Characteristics of an Airship by Means of a Camera Obscura. By J. W. Crowley, Jr., and R. G. Freeman. 8 pages, illustrations, quarto. Washington, Government Printing Office, 19-35. Price, ten cents This investigation was carried out by the Committee at Langley Field for the purpose of determining the adaptability of the camera obscura to the securing of turning characteristics of airships, and also of obtaining some of those characteristics of the C-7 airship. The method consisted in flying the airship in circling flight over a camera obscura and photographing it at known time intervals. The results show that the method used is highly satisfactory and that for the particular maneuver employed the turning diameter is 1240 feet,
Aug., 1925.1
J?UBLICATIONS
RECEIVED.
271
corresponding to a turning coefficient of 6.4, and that the position of zero angle of yaw is at the nose of the airship. By A. F. Zahm. Report No. 212, Stability Equations for Airship Hulls. 5 pages, illustrations, quarto. Washington, Government Printing Office, 1925. Price, five cents. The report includes simple form& for determining, directly from the data of wind-tunnel tests of a model of an airship hull, what shall be the approximate character of oscillation, in pitch or yaw, of the full-scale ship when slightly disturbed from steady forward motion.
PUBLICATIONS
RECEIVED.
Physics in Industry. Lectures delivered before the Institute of Physics, by J. W. Mellor, A. E. Onley, and C. H. Desch, with a foreword by the Hon. Sir Charles A. Parsons. Vol. II, 48 pages, illustrations, plates, 8~0. Oxford University Press, 1924. Price, $1. Companion to the First Edition of Chelndcal Synonyms and Trade Names, by William Gardner. 55 pages, 8~0. London, Crosby Lockwood and Son, 1925. Price, 7 shillings, 6 pence. The Animal a.s a Converter of Matter a& Energy. A study of the rBle of livestock in food production, by Henry Prentiss Armsby, and C. Robert Moulton. American Chemical Society Monograph Series. 236 pages, illustrations, 8vo. New York, The Chemical Catalog Company, 1925. Price, $3. A Text-book of Inorganic Chemistry, edited by J. Newton Friend. Vol. 3, part I, The Alkaline Earth Metals, by May Sybil Burr. xxvi-346 pages, figures, tables, Svo. London, Charles Griffin and Company, 1925. A c&perative effort by a group of A Treatise on Physical Chemistry. physical chemists. Edited by Hugh S. Taylor, D.Sc. Second printing-corrected. 2 vols., illustrations, 8vo. New York, D. Van Nostrand Company, 1925. Syndicat de la Presse Technique Inda&uieZle, Commrciale et Agricole de France. Programme, rer Congres International, September, 1925. 112 pages, portraits, quarto. Paris, Syndicat, 1925. The Physical Chemistry of Igneous Rock Formation. A General Discussion held by the Faraday Society, the Geological Society, and the Mineralogical Society, October, 1924. g3 pages, illustrations, figures, tables, 8~0. London, Faraday Society. Price, 6 shillings, 6 pence. The Crystal&e State, by Sir William Henry Bragg. The Romanes Lecture delivered in the Examination Schools, 20 May, 1925. 31 pages, illustrations, 8~0. Oxford, Clarendon Press, 1925. -Price, seventy cents. Electricity and the Structure of Matter, by L. Southerns. 128 pages, illustrations, r2mo. London, Oxford University Press, 1925. Price, $I. Introduction GPomPtrique a la MCca+ziqw Ratiouelle, by Charles Cailler. xii-628 pages, figures, 8vo. Paris, Gauthier-Villars et Cie., 1924. Price, 40 francs. United States Department of Commerce: Elimination of Waste: Simplified Practice Recommendation, No. 23, Plow Bolts. IO pages, illustrations, tables, Svo. No. 25, Hot-water Storage Tanks. IO pages, illustrations, tables, 8vo. Washington, Government Printing Office, 1925.