BOOKS RECEIVED 



{Publishers are requested to notify prices.) 



Elementary Algebra. Part II. By C. V. Durrell, M.A., Senior Mathematical 

 Master, Winchester College, and R. M. Wright, M.A., Assistant Master, 

 Eton College. London: G. Bell & Sons, 1921. (Pp. xxiii -f- 551 + 

 Ixxxv.) Price 5s. 6d. net. 



Exponentials Made Easy, or the Story of " Epsilon." By M. E. J. Gheury 

 de Bray. London : Macmillan & Co., St. Martin's Street, 192 1. (Pp. x 

 + 253.) Price 4s. 6d. net. 



Three Lectures on Fermat's Last Theorem. By L. J. Mordell, Manchester 

 College of Technology. Cambridge: at the University Press, 192 1. 

 (Pp. 31.) Price 4s. net. 



A Treatise on the Integral Calculus, with Applications, Examples, and Problems. 

 By Joseph Edwards, M.A., Principal of Queen's College, London. Vol. I. 

 London : Macmillan & Co., St. Martin's Street, 192 1. (Pp. xx + 907.) 

 Price 50S. net. 



Cinematique et Mecanismes. Par R. Bricard, Professeur au Conservatoire des 

 Arts et Metiers. Paris: Librairie Armand Colin, 103 Boulevard Saint- 

 Michel. (Pp. 212.) Price 5 fcs. 



Traite Pratique de Geometrie Descriptive. Par J. Geffroy, Ingenieur des 

 Arts et Manufactures, Professeur a I'ficole Centrale. Paris : Librairie 

 Armand Colin, 103 Boulevard Saint-Michel. (Pp. ii + 191.) Price 

 5 fcs. 



Statique et Dynamique. Par Henri Beghin, Professeur a I'ficole Navale. 

 Paris : Librairie Armand Colin, 103 Boulevard Saint-Michel. (Pp. viii -j- 

 200.) Price 5 fcs. 



Simple Lessons on the W^eather for School Use and General Reading. By 

 E. Stenhouse, B.Sc, Associate of the Royal College of Science, London. 

 London: Methuen & Co., 36 Essex Street, W.C. (Pp. viii -f 135, with 

 12 plates and 62 other illustrations.) 



Les Theories d'Einstein. Nouvelle Edition Epuree, accrue de Notes Limin- 

 aires, d'un Expose des Theories de Wejd, et de Trois Notes de MM. 

 Guillaume, Brillouin, et Sagnac sur leurs propres idees. By Lucien 

 Fabre. Paris: Payot et Cie, 106 Boulevard Saint-Germain, 1921. 

 (Pp. 255.) Price 7 fr. 50. 



Vorlesungen iiber die Theorie der Warmestrahlung. Von Dr. Max Planck, 

 Professor der Theoretischen Physik an der Universitat Berlin. Vierte, 

 abermals Umgearbeitete Auflage. Leipzig : Verlag von Johann Am- 

 brosius Barth, 1921. (Pp. xi -j- 224.) Price 26 marks. 



Moderne Magnetik von Felix Auerbach. Leipzig : Verlag von Johann 

 Ambrosius Barth, 1921. (Pp. viii -f 304, with 167 text-figures.) Price 

 48 marks. 



The Scientific Papers of the Honourable Henry Cavendish, F.R.S. Vol. I : 

 The Electrical Researches ; edited from the published papers and the 

 Cavendish Manuscripts in the possession of His Grace the Duke of 



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