[ 400 ] 

 XL VII. Notices respecting New Books. 



Lecons sur V Electricite. Par Eric Gerard. Tome Second. Paris : 



G-authier- Villars, 1905. Pp. viii + 888. 

 rpHE publication of the second volume of the seventh edition of 

 -*- this work has not lone; been delayed after the appearance of the 

 first volume, and the high terms in which we spoke of the latter 

 must also be extended to the former. A perusal of the work 

 cannot fail to produce the impression that it is a wonderfully com- 

 plete and well-balanced account of the present state of electro- 

 technology. There is hardly a single aspect of the subject left- 

 unnoticed by the author, and yet the book is extremely readable 

 and not overloaded with detail. It is in every respect an ideal 

 student's book. 



The present volume deals with alternate-current transformers, 

 their theory, construction, design and testing; induction-coils and 

 their applications ; systems of distribution, overhead lines, under- 

 ground conductors, submarine cables, telegraphy, telephony, electric 

 lighting and lamps, photometry, motors — continuous current, 

 polyphase, single-phase, induction and synchronous — rotary con- 

 verters, power transmission, electric traction, electro-metallurgy, 

 and electro-chemistry. 



The diagrams and illustrations are characterized by simplicity, 

 but their reproduction is far from perfect, and leaves a good deal to 

 be desired. This is about the only feature of the book which calls 

 for adverse criticism, and to which the publishers would do well to 

 give some attention. 



Mathematical and Physical Papers. Vol. V. By the late Sir George 

 Gabriel Stokes. Reprinted from -he Original Journals and 

 Transactions, with brief Historical Notes and References. 

 Cambridge : at the University Press. 1905. Pp. xxv -f- 370. 

 Dr. Larmor's task of editing those papers of the late Sir G. G. 

 Stokes which had not been included in the first three volumes — 

 the third being the last which their illustrious author was 

 able personally to prepare for publication — has now been 

 completed. The present volume contains various short papers and 

 notes, very frequently having reference to the work of other 

 investigators who asked for that advice and guidance which were 

 always so generously and freely given. In order to render the 

 volume self-contained, contributions by other authors are included 

 where necessary to the complete understanding of Sir G. G. 

 Stokes's criticisms or suggestions. "We notice a paper " On the 

 Maximum Wave of Uniform Propagation," which has never been 

 published before. An appendix contains Mathematical Tripos 

 and Smith's Prize Examination papers set by Sir G. G. Stokes. 

 The volume opens with the masterly Obituary Notice by Lord 

 Rayleigh, reprinted from the Proceedings of the Royal Society, 

 and it is adorned by an excellent portrait of Sir G. G. Stokes in 

 his later years. 



