SCIENCE— ADVERTISEMENTS 



Cambridge University Press 



NEW AND STANDARD MATHEMATICAL TEXTBOOKS 



A Shorter Geometry. By C. Godfry, M.V.O., 

 M.A., and A. W. Siddons, M. A. In one volume 

 or in four parts. Part I, 30c. ; Parts II, III, and 

 IV, 25o. each. Notes and Answers to Exer cises, 15o. 



A well-arranged and clearly expounded school textbook 

 which covers the three stages distinguished in a recent 

 recommendation of the Board of Education. 



The Elements of Solid Geometry 



Davison, Set). 75 cents. 



By Charles 



Numerical Trigonometry. By J. W. Mercer, 

 Head Master of the Mathematical Department, 

 Royal Naval College, Dartmouth. 75 cents. 

 This book is an attempt to indicate the kind of work that 

 can be done by boys of 13 to IS, who. having no particular 

 mathematical bent, yet take very kindly tonumerlcal prob- 

 lems connected with geometry, physics, mechanics, &c. 

 The range of such problems is greatly increased if the 

 learner has an elementary knowledge of Trigonometry. 



Algebra for Secondary Schools. By Charles 

 Davison, Sc. D., Mathematical Master at Kinj; 

 Edvfard's High .'Jchool, Birmingham. In one vol- 

 ume |2.00, or in two volumes $1.00 each (With- 

 out answer, 7,50) Vol. I, $1.00. To Quadratic 

 Equations. Vol. II, $1.00. From Quadratic 

 Equations. Exercise only, with answers, $1.00; 

 without answers 75o. 



Algebra for Beginners. By C. Godfrey, M.V.O., 

 M.A., Head Master of the Royal Naval College, 

 Osborne, and A. W. Siddons, M.A., Assistant 

 Master at Harrow School, with answers 75 cents. 

 In this book the authors have followed the lines laid down 

 in the Report of the Mathematical Association Committee 

 on the teaching of Elementary Algebra and Numerical 

 Trigonometry (1911) ; they are also indebted for valuable 

 ideas to the Board of Education Circular on the teaching 

 of Geometry and Graphic Algebra (Circular 711, March, 

 1909). The book will also be found to fit in with the 

 Algebra Syllabus suggested by the Head Masters' Confer- 

 ence. A prospectus will be forwarded on application. 



Write for new 1912-13 Educational Catalogues 



Q. P. PUTIVAM'S SONS 



The geometery of line in space, polyhedron, cylinder, 

 cone, and sphere is here given, forming an admirable 

 course in the elements of solid geometry. 



The Calculus for Beginners. By J. W. Mercer, 

 M. A., Head of the Mathematical Department, Royal 

 Naval College, Dartmouth. $2.00. 



This book follows the lines on which the subject bos been 

 taught to boys of sixteen during the last few years at the 

 Royal Naval College, Dartmouth, and is intended pri- 

 marily for those who are or will be interested in applica- 

 tions of the Calculus to Physics and Engineering. No 

 great amount of previous mathematical knowledge is 

 assumed. 



Elements of the Differential and Integral Cal- 

 culus. By A. E. H. Love, M.A., D.Sc, F.R.S., 

 Sedleian Professor of Natural Philosophy in the 

 University of Oxford, f 1.50. 



2, 4, 6 West 45th Street, 



AMERICAN REPRESENTATIVES 



New York City. 



Recent Publications of the New York Botanical Garden 



Journal, Vol. XIII, No. 152. An illustrated monthly containing notes and non-technical articles of 

 general interest. $1.00 a year. 



Mycologia, Vol. IV, No. 5. An illustrated bimonthly publication devoted to fungi and lichens. 

 $3.00 a year. This number contains: The Agaricaceae of the Pacific Coast — II, by William 

 A. Murrill ; Polyetictus versicolor as a Wound Parasite of Catalpa, by Neil E. Stevens ; Type 

 Studies in the Hydnaoeae — I. The Genus Manina, by Howard J. Banker ; Aspergillus In- 

 fecting Malacosoma at High Temperatures, by Wilson P. Gee and A. Ballard Massey ; Two 

 New Species of Rusts, by William H. Long ; Index to American Mycological Literature. 



Bulletin, Vol. VIII, No. 27. $3.00 per volume. This number contains the annual report of the 

 Director-in-Chief and other oflncial documents. 



Memoirs, Vol. 3. $2.00. Studies of Cretaceous Coniferous Remains from Kreischerville, New York, 

 by Arthur HoUick and Edward C. Jeffrey, vii-|-138 pp., with 29 plates. 

 Vol. 4. $2.00. EflEects of the Rays of Radium on Plants, by C. Stuart Gager, vii-(-278 pp., 

 ■with 73 figures and 14 plates. 



North American Flora. Descriptions of the wild plants of North America. To be complete in 

 about thirty volumes of four or more parts each. Subscription price for entire work $1.50 

 per part; separate parts $2.(10. Seventeen parts have been issued, seven on fungi, nine on 

 flowering plants, and one on ferns. Parts recently issued are : 



Vol. 25, part 3, issued May 6, 1911. Rutaceae, Surianaoeae, Simaroubaceae and 



Buraeraoeae. 

 Vol. 7, part 3, issued April 15, 1912. Aecidiaceae (continuatio). 

 Vol. 17, part 2, issued September 13, 1912. Poaceae (pars). 



Contributions, a beries of technical papers by students or members of the staff. $5.00 per vol- 

 ume ; 25 cents each. Recent numbers : 151. Studies on the Rocky Mountain Flora — 

 XXVI, by Per Axel Rydberg. 152. The Genus Struthiopteris and its Representatives in 

 North America — II, by Jean Broadhurst. 



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