BOOKS RECEIVED 169 



Cytology, with Special Reference to the Metazoam Nucleus. By W. E. Agar, 

 Professor of Zoology in the University of Melbourne. London : Mac- 

 millan & Co., St. Martin's Street, 1920. (Pp. xii + 224.) Price 12s. net. 



A Junior Course of Practical Zoology. By the late A. Milnes Marshall, M.D., 

 D.Sc, M.A., F.R.S., and the late C. Herbert Hurst, Ph.D. Ninth Edition. 

 Revised by F. W. Gamble, D.Sc, F.R.S. London : John Murray, 

 Albemarle Street, W., 1920. (Pp. xvii + 517.) Price 12s. net. 



La Telefonia Senza Filo. By Umberto Bianchi. Milano : Ulrico Hoepli, 

 Editore-Libraio della real Casa, 1920. (Pp. viii + 296, with 194 figures 

 and 6 plates.) Price L. 10. 



The Propagation of Electric Currents in Telephone and Telegraph Conductors. 

 By J. A. Fleming, M.A., D.Sc, F.R.S. , University Professor of Electrical 

 Engineering in the University of London. Third Edition, revised and 

 extended. London : Constable & Co., 10 Orange Street, Leicester 

 Square, W.C., 1919. (Pp. xiv + 370, with 19 figures.) Price 21s. net. 



Aviation : Theorico-Practical Textbook for Students. By Benjamin M. Car- 

 mina, Assistant Chief Instructor at the Y.M.C.A. Airplane Mechanics' 

 School, Charter Member and Lecturer of the Aeronautical Society. New 

 York: The Macmillan Company, 19 19. (Pp. xi + 172.) Priceiis.net. 



Cement. By Bertram Blount, F.LC. Assisted by William H. Woodcock, 

 F.C.S., Memb. Soc. Pub. Anal., and Henry J. Gillet. (Pp. xii + 283. 

 with diagrams and illustrations.) Price i8s. net. 



The Theory and Practice of Aeroplane Design. By S. T. G. Andrews, B.Sc. 

 (Engineering), London. Member of the Institute of Aeronautical En- 

 gineers, Consulting Engineer, and S. F. Benson, B.Sc. (Engineering), 

 London. London: Chapman & Hall, 11 Henrietta Street, W.C. 2, 1920. 

 The Directly-Useful Technical Series, founded by the late Wilfred J. 

 Lineham, B.Sc, M.Inst.C.E. (Pp. xii + 454, with 305 figures.) Price 

 15s. 6d. net. 



The Amount of Steam used by Steam Jets. By D. Brownlie, B.Sc, F.C.S., 

 A.I.Mech.E. Reprinted from " Engineering," January 16, 1920. Lon- 

 don : Brownlie & Green, 2 Austin Friars, E.C.2. (Pp. 14.) Price is. 6d. 

 net. 



Proposal for a Network of Wireless Communications to serve the Needs of 

 the whole British Empire. Submitted by Marconi's Wireless Telegraph 

 Co., Ltd. February 1920. (Pp. 20.) 



Thermodynamics for Engineers. By J. A. Ewing, K.C.B., M.A., LL.D., 

 D.Sc, F.R.S., M.Inst.C.E., M.Inst.Mech.E., Principal and Vice-Chancellor 

 of the University of Edinburgh. Cambridge : at the University Press, 

 1920. (Pp. xii + 383.) Price 30s. net. 



The Engines of the Human Body. Being the Substance of Christmas Lec- 

 tures given at the Roval Institution of Great Britain, Christmas, 1916-17. 

 By Arthur Keith, m'd., LL.D., F.R.S. London : Williams & Norgate. 

 14 Henrietta Street, Covent Garden, W.C.2, 1919. (Pp. xii -\- 284, with 

 2 plates and 47 figures.) Price los. 6d. net. 

 The subject of this book is well indicated by the title, and the distinguished 



author has done his task extremely well. The mechanical nature of many, 



if not of all, the processes of life should be prominently before students and 



the public. 



