Notiee to Reader.— Vhta you finish reading 

 this magazine, place a 1 cent stamp on this notice, 

 mail the magazine, and it will be placed in the 

 hands of our soldiers or sailors destined to pro- 

 ceed overseas. No wrapping— No Address. A' 

 S, Barlesoa, Poslmaster-GoneraJ. 



SCIENCE 



Niw SIMM Friday Tttnf 14 1918 bikol. copie*. is era. 



Vol. XLVU No. 1224 T KIDAY, J UJNi, 11, 1310 Annbal ScBsoEinio.s, IS.Oe 



Pry or — IN aval Hygiene 



By James Chambers Pryor, A.M., M.D., Medical Inspector, U. S. Navy; 

 Head of Department of Hygiene, U. S. Naval Medical School, etc. 



Published with the Approval of the Surgeon-General, U. S. Navy and by Per- 

 mission of the Navy Department. 



This book is a practical guide to the "latest word" on naval hygiene by a 

 teacher and practitioner whose experience has been considerable. Well illus- 

 trated. Will be ready very shortly. 



Stitt — Practical Bacteriology 



Blood-'Workrand Animal Parasitolos^y 



New, Fifth Edition, Revised and Enlarged. Including Bacteriological Keys, 

 Zoological Tables and Explanatory Clinical Notes. 



By E. R. Stitt, A.B., Ph.G., M.D., Rear-Admiral, U. S. Navy; Medical 

 Director, U. S. Navy; Commander U. S. Naval Medical School. 



Many new Illustrations. Including Several Plates. Will be ready very shortly. 



Brownell — General Science 



By Herbert Bro^vnell, B.Sc, Teacher's College, University of Nebraska, 

 Lincoln, Nebraska. 



A textbook seeking to relate the teachings of science and the common experi- 

 ences of life. It is calculated to fill a wider need for a text along biological lines 

 rather than along distinctly mathematical or physical lines. 



Well Illustrated. Will be ready very shortly. 



JUST PUBLISHED 



Hopewell-Smith— Normal and Pathological 

 Histology of the Mouth 



Revised and enlarged. Handsomely Illustrated. Many new pictures. By 

 Arthur Hopewell-Smith, L.R.C.P. (London), M.R.C.S. (England), L.D.S. 

 (England), Professor of Dental Histology, Pathology and Comparative Odon- 

 tology, University of Pennsylvania, Dental School, etc. 



Vol. I. Normal Histology, 264 Illustrations, Including 2 Colored Plates (149 

 original photomicrographs by the author.) Cloth. ?4.50 postpaid. 



Vol. II. Pathological Histology. 394 Illustrations. Including many orig- 

 inal photomicrographs by the author. With a section on the Histogenesis of 

 the teeth of Mammals, Fishes, and Reptiles. 



P. BL7\KIST©N'S SON & 6©. 



PUBLISHERS PHILaOELPHia 



