SCIENCE-ADVERTISEMENTS 



The University of 

 Pittsburgh 



THE SCHOOL OF MEDICINE 



THOMAS SHAW ARBUTHNOT, H.D., Dean 



One full year of recognized college work, inclu- 

 ding courses in Physics, Chemistry and Biology is re- 

 quired for admission, in addition to the four-year 

 high school State law requirement. Beginning with 

 the year 1913-14 two years of college work will be 

 required. 



The curriculum permits of an arrangement 

 whereby students may receive two degrees, B.S. and 

 M.D., In six years. 



A thoroughly equipped new laboratory building 

 has been erected upon the university campus. Clin- 

 ical work in small sections in afBliated Pittsburgh 

 Hospitals. Required work includes residence in 

 Maternity Hospital, with board and room furnished. 



For bulletin and information, address, 



S. B. LINHART, Secretary of the University 



Grant Boulevard, Pittsburgh, Pa. 



MARINE BIOLOGICAL LABORATORY 



WOODS HOLB, MASS. 

 Biological Materia) 



1. Zoology. Preserved material of all types of anlmoii 

 for class work and for the museum. 



2. Embryology. Stages of some invertebrates, fishes (In- 

 cluding Acanthias, Amia and Lepldosteus), Amphibia, and 

 some mammals. 



3. Botany. Preserved material of Algae, Fungi, Liver- 

 worts, and Mosses. Price lists furnished on application to 



QBORQE M. QRAV, Curator, Woods Hole, Mass. 



GOODE'S BASE MAPS 



For classes in geography, geology, eco- 

 nomics, history, etc. 18 subjects. Two 

 sizes: SxlOJin., Ic; 15xlOJ in., 3c; pos- 

 tage extra. Perforated for notebook ; suit- 

 able for ink or pencil. Samples on request. 



The University of Chicago Press 

 Chicago, Illinois 



THE UNCAUSED BEING AND THE CRI- 

 TEHION OF TRUTH 



By E, Z. Derr, M.D. 

 The book's object is to combat the doctrine that the universe 

 is a self existent or uncreated thing, and to show that on scien- 

 tific grounds we are compelled to regard it as created. jThe 

 method pursued is original, and the result convincing. 

 $1.00 net ; by mail, S1.09 

 Sherman, French <& Company, 

 Publishers, Boston 



SnCOND EDITION 



AMERICAN MEN OF SCIENCE 



A BIOGRAPHICAL DIRECTORY 

 EDITED BY J. HcKEEN CATTELL 



A. Siographical directory teqvirea revision if it is to maintain its usefulness. Nearly a third of the names in the 

 present edition are new, and the sketches which appeared in the first division have in nearly every case been revised. The 

 amount of work required to prepare the revision has been as great as that given to the first edition. There has been no 

 change in the general plan of the work. Greater strictness has been observed in confining its scope to the natural and 

 excKt sciences, and for this reason a few names included in the first edition have been omitted. Efforts have been exerted to 

 make the book as complete and accurate as possible. There are of course omissions, if only because some men will not 

 reply even to repeated requests for the information needed. The thousand leading men of science have been again selected 

 by the methods that were used before, and stars have been added to the subjects of research in the case of 269 new men who 

 have obtaimd places on the list. The editor's object in selecting this group oi scientific men has been to make a study of 

 the conditions on which scientific research depends andsofar as may be to improve these conditioiis. 1 here are printed in 

 an appendix the two statistical studies that have been made. — Fro7n the Preface to the Second Edition. 



The second edition of tbe Directory extends to more than 600 pajjes and contains more than 5500 sketches. 

 It is well printed on all rag paper and bound in buckram with leather label. Although the work basbeeu 

 increased in size by more thau 50 per cent., it is sold at the same price as the first edition. 



Price : Five Dollars, net, Postage paid 



THB SeiENCB PRBS3 



GARRISON. N. Y. LANCASTER, PA. 



SUB-STATION 84, NEW YORK CITY. 



