BOOKS RECEIVED 687 



Letters of a Radio-Engineer to His Son. By John Mills, Engineering 

 Department, Western Electric Company. London : George Routledge 

 & Sons, 68 Carter Lane, E.C., 1922. (Pp. 265, with 136 figures and 12 

 plates.) Price los. 6d. net. 



Abstract-Bulletin of Nela Research Laboratory, National Lamp Works of 

 General Electric Company, Cleveland, Ohio. By Edward P. Hyde, 

 Director. Vol. L No. 3. Published by the Research Department, 

 1922. (Pp. ix + 303-521.) 



La Houille Blanche. Par Henri Cavailles, Professeur au Lycee de Bordeaux. 

 Paris : Librairie Armand Colin, 103 Boulevard Saint-Michel, 1923. 

 (Pp. vi -f- 215, with 8 maps and 4 figures.) Price 5 frs. 



Human Character. By Hugh Elliot. London : Longmans, Green & Co., 

 39 Paternoster Row, 1922. (Pp. xvi + 272.) Price 7s. 6i. net. 



The Measurement of Emotion. By W. Whately Smith, M.A., with a Foreword 

 by W. Brown, M.D., D.Sc. London : Kegan Paul, Trench, Triibner 

 & Co., 1922. (Pp. 184.) Price 105. 6d. net. 



Tractatus Logico-Philosophicus. By Ludwig Wittgenstein, with an Intro- 

 duction by Bertrand Russell, F.R.S. London : Kegan Paul, Trench, 

 Triibner & Co., 1922. (Pp. 189.) Price los. td. net. 



Colour Vision. A Discussion of the Leading Phenomena and their Physical 

 Laws. By W. Peddie, D.Sc, V.P.R.S.E., University of St. Andrews. 

 London : Edward Arnold & Co., 1922. (Pp. xii + 208.) Price 125. 6d. 

 net. 



The New Psychology and the Parent. By H. Crichton Miller, M.A., M.D., 

 Editor " Functional Nerve Disease." London : Jarrolds, Ltd. (Pp. 255.) 

 Price 6s. net. 



Die Lehre vom Diskreten Raum in der Neueren Philosophic. Von Nikola M. 

 Poppovich, Dr. Phil. Vienna and Leipzig : Wilhelm Braumoller, 

 Universitats-Verlagsbuchhandler, Ges. (m.b.)H., 1922. (Pp. 89.) 



The Principles of Logic. By F. H. Bradley, Fellow of Merton, Oxford. 

 Second Edition. Revised, with Commentary and Terminal Essays. 

 London : Oxford University Press, 1922. (Pp., Vol. I, xxviii + 388, 

 Vol. II, 389-739.) Price 36s. net. 



Life Contingencies. By E. F. Spurgeon, F.I. A. Published by the authority 

 and on behalf of the Institute of Actuaries by Charles and Edwin Layton, 

 Farringdon Street, E.C.4. London : 1922. (Pp. xxvi + 477-) 



Discoveries and Inventions of the Twentieth Century. By Edward Cressy. 

 Second Edition. Revised and Enlarged. London : George Routledge 

 & Sons ; New York : E. P. Dutton & Co., 1923. (Pp. xxiii + 458, with 

 342 figures.) Price 12s. 6d. net. 



The greater part of this book has been wholly rewritten. Chapter 

 XII, which gives some account of the achievements of modern chemistry, 

 is new, while Chapter XVIII of the old edition has been omitted, since 

 it was not the wish of the author to give an account of the subject — 

 Ships of War and their Weapons — which would inevitably be imperfect. 



Annuaire pour I'An 1923, publie par le Bureau des Longitudes avec des 

 Notices Scientifiques. Paris : Gauthier-Villars et Cie., 55 Quai des 

 Grands-Augustins. (Pp. viii -f 654.) Price 6.50 frs. 



Les Helicopteres, Recherches Experimentales sur le Fonctionnement le plus 

 general des Helices. Etudes sur la Mecanique de I'Helicoptere. Par 

 W. Margoulis, Ancien Directeur du Laboratoire Eiffel. Paris : Gauthier- 

 Villars et Cie., 55 Quai des Grands-Augustins, 1922. (Pp. x -t- 90.) 

 Price 10 frs. 



