SCIENCE-ADVERTISEMENTS 



THE 

 PRINCIPLES OF 

 STRATIGRAPHY 



BY 

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



PROFESSOR OF PALEONTOLOGY IN 

 COLUMBIA UNIVERSITY 



"Should be on the reference slielf of every col- 

 lege, normal school, and large high school in the 

 United States." — Journal of Geography, Vol. XIII, 

 Jan. 1915. 



8bo, IISO Paget, 264 illatlrationM. Priem, $7. BO 



DaaeriptiT* Circular Sent upon Reiiaeit 



A. G. SEILER & CO. 



NEW YORK CITY 



TIME-SAVERS 



For mathematics teachers, students, pro- 

 fessional computers and engineers a — 



Computing Tables and Mathe- 

 matical Formulas — Barker 



Well adapted for professional computers 

 and engineers . . . Pocket size, 60 cents 



Tables and Formulas — Revised 



Edition — -Longley 



For solving numerical problems in anal- 

 ytic geometry, calculus, and applied 

 mathematics . . . Pocket size, 50 cents 



Logarithmic Reduction Tables — 



Moore 



Tables covering gravimetric, volumetric, 

 and gas analysis Svo, $1.00 



Ginn and Company 



Boston New York Chicago London 



Atlanta Dallas Columbus San Francisco 



UNIVERSITY OF CALIFORNIA 

 PUBUCATIONS 



Th« University of CallfcH'nla issues publications in the 

 followins series am ng othersi 



Agricultural Science Mathematics 



American Archeology Pathology 



and Ethnology Philoeophy 



Botany Physiology 



Economics Psychology 



Geology Zoology 



Memoirs of the University of California 

 Bulletin and Publications of the Lick Observatory 



RECENT TITLES 



Miwok Myths, by E. W. Gifford 55 



California Kinship Systems, by A. L.Kroeber 60 



New Pacific Coast Marine Algae I, by Nathaniel L. 



Gardner 40 



An Extinct Toad from Kancho La Brea, by Charles L. 



Camp 05 



New Grasses for California, I. Phalaris stenoptera, by P, 



B. Kennedy 25 



The Structure of the Pes of Mylodon harlani, by Chester 



Stock 20 



Experiments on the Effects of the Constituents of Solid 

 Smelter Wastes on Barley Growth in Pot Cultures, 

 by C. B. Lipman and W. F. Gericke 95 



Complete list of titles and prices will be sent j !^ 

 on applltHition t-j ^ 



THE (JNIVERSTTT fRSSS • . • Berlicier, Catifomia 



The Microscope 



12th Edition, Published April 10, 1917 



Re-Written and larEeljr Re-IIIustrated 



By SIMON HENRY GAGE of Cornell Unlvenlty 



Poitpaid $3.00 



CX)MSTOCK PUBLISHING CO., Ithaca, N. Y. 



The Ellen Richards Research Prize 



The Naples Table Aasooiation for Promoting 

 Laboratory Eesearoh by "Women annonnoes the offer 

 of a research prize of $1000.00 for the best thesis 

 written by an American woman embodying new ob- 

 iervations and newconolnsions based on independent 

 laboratory research in Biology (including Psy- 

 ahology), Chemistry or Physics. Papers pnbliehed 

 before 1916 will not be considered and theeee pre- 

 sented for a Ph. D. degree are not eligible. Theses 

 eSared in competition mast be in the hands of the 

 Chairman of the Committee en the Prize before 

 February 25, 1918. Application blank* may be ob- 

 kained from the secretary, Mrs. Ada Wing Mead, 

 823 Wayland Avenue, Providence, R. I. 



Biology Professor Wanted 



At Mt. Allison University for year beginning Sept. 

 22d, 1917. Apply giving particulars and teiti- 

 monials to 



B. C. BRODEN, President 

 Sackville, N. B. CANADA 



