SCIENCE— ADVERTISEMENTS 



NEW BOOKS 



KEW 

 Cretaceous and Cenozoic Echinoidea 

 of the Pacific Coast 



133 Pages, 40 Plates, Paper $2.50 



SWARTH 

 Revision of the Avian Genus 

 Passerella 



149 Pages Paper $1.75 



ALLEN 

 Plankton of the San Joaquin 

 River 



292 Pages Paper $3.00 



Carriage Extra 



The University of California Press 



Berkeley, California 19 East 47th Street, New York 



New Chemistry Books 



HOOD AND CARPE^ITER -Textbook of 

 Practical Cliemistiry. Ready February 



COPAUX-LEFFMANN— Introduction to Gen- 

 eral Chemistry. 



An Exposition of the Principles of Modern 

 Chemistry. By H. COPAUX (Paris), and 

 Hknry Leffmann (Philadelphia.) 30 Il- 

 lustrations. Cloth, $2.00. 



SMITH— Priestley in America 



By Edgar F. Smith (University of Penn- 

 sylvania.) Cloth, $1.50. 



McGUIGAN — Introduction to Ctiemical Phar- 

 macology 



By Hugh McGuigan, Ph.D. (University 

 of Illinois.) Cloth, $4,00. 



AUTENREITH — Detection of Poisons and 

 Powerful Drugs 



Fifth Edition. Illustrated. Cloth, $3.50. 



MOLINARI— Treatise on General and Industrial 

 Organic Chemistry 



254 Illustrations. Pt. I. Cloth, #8.00. 



SCHNEIDER— The Micro-analysis of Powdered 

 Vegetable Drugs 



Second Edition. 237 Illustrations. Cloth, 



P. Blakiston's Son & Co. 



Publishers Philadelphia 



School and Society 



A weekly journal covering the whole field of Ed- 

 ucation in relation to the problems of American de- 

 mocracy. Published every Saturday. 

 Annual Subscription, $5.00. Single numbers, 15 cts. 



The Scientific Monthly 



An illustrated magazine, devoted to the diffusion 

 of science, publishing articles by leading authorities 

 in all departments of pure and applied science, includ- 

 ing the applications of science to education and society. 

 Annual Subscription, $5.00. Single number, 50 cts- 



The American Naturalist 



A bi-monthly journal, establislied in 1867, devoted 

 to the biological sciences with special reference to the 

 factors of organic evolution. 

 Subscription, $5.00. Single numbers, $1.00. 



THE SCIENCE PRESS 



GARRISON, N. Y. 



fi[FilBlffBIMIS!Bl!;ttli!!iiIISIlll!!lIlili!!lllSIlIiil!lli:BJl!^ 



