SCIENCE -ADVERTISEMENTS 



WEED'S CHEMISTRY 

 IN THE HOME 



By Henry T. Weed, B.S., Head of Science 



Department, Manual Training School, 



Brooklyn, N. Y. 386 pages. Elustrated 



S1.20. 



A general course in chemistry for students 



who do not intend to go to college. It treats 



of chemical processes and products in a way 



that leads a pupil to make use of what he 



leams. 



For example, by the food tables given he 

 can tell whether he is receiving proper nourish- 

 ment; he learns how foods may properly be 

 preserved and the changes which occur when 

 foods are cooked; he leams how metals can be 

 protected against corrosion ; how dyes may 

 be used successfully in the home, etc., etc. 



Ask for "100 Practical Chemistry 

 Questions About the Home" — it will 

 show you the practical scope of this 

 book. 



AMERICAN BOOK COMPANY 



New York Cincinnati Chicago 



For the Physiography 

 Library 



GEOGRAPHICAL ESSAYS 



By William M. Davis, Harvard University. 

 777 pages, $2.75. 



Presented in a form especially adapted to the 

 use of advanced students and teachers of physio- 

 graphy. 



GLACIERS OF NORTH AMERICA 



By Israel C. Rdssell. late of the University of 

 Michigan. 210 pages, illustrated, 81,75. 



This book presents not only the results of the 

 author's own explorations but also a condensed 

 and accurate statemeat of the present status of 

 glacial investigations. 



LAKES OF NORTH AMERICA 



By Israel C Russell, late of the University of 

 Michigan. 125 pages, illustrated, $1.50. 



The author has selected from the broad subject of 

 physical geography a single phase with which be 

 is familiar from original Investigations, and has 

 presented it in its modernized aspect. 



Ginn and Company 



Boston New York CIiicaKo LoodoB 



The American Academy 

 of Arts and Sciences 



28 Newbury Street, Boston, Mass. 



Just issued. Proceedings, Vol. Bl, Nos. 10, 11 and 12. 



51. 12. Bridgman, P. W. — Polymorphic changes under 

 Pressure of the Univalent Nitrates. Pp. 579-625. April, 1916. 

 70 cents. 



Bl. 11. Mavor, James W. — On the Life-History of Cera- 

 tomyxa aeadiensis, a new species of Myxosporidia from the 

 eastern coast of Canada. Pp. 549-57S. apll. AprU, 1916. 70 

 cents. 



Bl. 10. (I) Blalie, S. F — Compositae new and trans- 

 ferred, chiefly Mexican: (II) Robinson, B. L. — New, reclassi- 

 fied, or otherwise noteworthy Spermatopliytes; (III) Macbride, 

 J. Francis.— Certain Borraqinaceae new or transferred. Pp. 

 513-648. January, 1916. 50 cents. 

 Other recent issues of the Proceedings 



61. 9. Mavor, J. W. — On the Development of the Coral 

 Agaricia Jragilis Dana. Pp. 483-511. 6 pll. Ueeember, 1915. 

 90 cents. 



51. 8. Kennelly, A. E., and Affel, H. A. — The Mechanics 

 of Telephone-Receiver Diaphragms, as Derived from their Mo- 

 tional-Impedance Circles. Pp. 419-482. November, 1915. $1.25. 



51. 7. Jackson, Dunham. — Expansion Problems with 

 Irregular Boundary Conditions. Pp. 3S1-417. November, 1915, 

 70 cents. 



51. 6. Kofoid, Charles .itwood, and Swezy, Olive. — Mito- 

 sis and Multiple Fission in Trichomonad Flagellates. Pp. 287- 

 379. 8 pis. November, 1915. $1.50. 



Bl. 5. TMieeler, William Morton.— The Australian Honey- 

 Ants of the Genus Leptomyrmex Mayr. Pp. 253-286. Novem- 

 ber, 1915. 60 cents. 



51. 4. Daly, Resinald A. — The Glacial-Control Theory of 

 Coral Reefs. Pp. 156-251. November, 1916. $1.25. 



61. 3. Warren, Charles A. — A Quantitative Study of 

 Certain Perthitic Feldspars. Pp. 12.5-154. October, 1915. 50 

 cents. 



S&nd for descripttve circulars and sample 

 pages 



PRINCIPLES OF 



STRATIGRAPHY 



BY 



AMADEUS W. GRABAU, S.M., S.D. 



PROFESSOR OF PALAEONTOLOGY IN 

 COLUMBIA UNIVERSITY 



Large Octavo, 1150 pages, with 254 illustrations in the text. 

 Cloth bound, price, $7.50. 



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