BOOKS RECEIVED 



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A Course of Modern Analysis. An Introduction to the General Theory ot 

 Infinite Processes and of Analytic Functions, with an Account of the Principal 

 Transcendental Functions. Second Edition. Completely Revised. By E. T. 

 Whittaker, D.Sc, F.R.S., Professor of Mathematics in the University of 

 Edinburgh, and G. N. Watson, M.A., Fellow of Trinity College, Cambridge, 

 and Assistant Professor of Pure Mathematics at University College, London. 

 Cambridge : at the University Press, 191 5. (Pp. 560.) Price \%s. net. 



Edinburgh Mathematical Tracts. London : G. Bell & Sons, York House, Portugal 

 Street, 191 5. 



1. A Course in Descriptive Geometry and Photogrammetry for the Mathematical 



Laboratory. By E. Lindsay Ince, M.A., B.Sc. (Pp. xviii + 79.) Price 

 2s. 6d. net. 



2. A Course in Interpolation and Numerical Integration for the Mathematical 



Laboratory. By David Gibb, M.A., B.Sc. (Pp. viii + 90.) Price 35. 6d. 

 net. 



3. Relativity. By A. W. Conway, D.Sc, F.R.S. (Pp. viii -f- 43.) Price zs. net. 



4. A Course in Fourier's Analysis and Periodogram Analysis for the Mathematical 



Laboratory. By G. A. Carse, M.A., D.Sc, and G. Shearer, M.A., B.Sc. 

 (Pp. viii + 66.) Price y. 6d. net. 



5. A Course in the Solution of Spherical Triangles for the Mathematical 



Laboratory. By Herbert Bell, M.A., B.Sc. (Pp. viii + 66.) Price 2s. 6d. 

 net. 



6. An Introduction to the Theory of Automorphic Functions. By Lester R. 



Ford, M.A. (Pp. viii -f 96.) Price y. 6d. net. 



Is Venus Inhabited ? By C. E. Housden, Member B.A.A. With Diagrams. 

 London : Longmans, Green & Co., 39, Paternoster Row, and New York, 

 Bombay, Calcutta, and Madras, 191 5. (Pp. 39.) Price is, 6d. net. 



In this pamphlet the author puts forward some theories with regard to the 

 physical condition of Venus, from a study of surface markings, and uses these 

 to support the supposition that the planet is inhabited. Considering that 

 neither a study of surface markings nor spectroscopic methods have been able 

 conclusively to settle whether the rotational period of Venus is 23 hrs. 1 1 min. 

 or 225 days, it is evident that the whole theory rests on the slenderest of 

 evidence, and although such a fantastic structure of unproven suppositions 

 may appeal to some minds, we cannot think that even the " broadminded 

 considerations " for which the author pleads will gain it many adherents. 



A Treatise on Light. By R. A. Houstoun, M.A., Ph.D., D.Sc, Lecturer on 

 Physical Optics in the University of Glasgow. With 328 Diagrams. 

 London : Longmans, Green & Co., 39, Paternoster Row, and New York 

 Bombay, Calcutta, and Madras, 191 5. (Pp. xi + 478.) Price js. bd. net. 



A Manual of Mechanics and Heat. By R. A. Gregory, Professor of Astronomy, 

 Queen's College, London, and H. E. Hadley, B.Sc, Associate of the Royal 

 College of Science, London ; Principal of the School of Science, Kidderminster. 

 London : Macmillan & Co., St. Martin's Street, 191 5. (Pp viii + 309.) Price 

 35. net. 



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