The American Naturalist 



THE SCIENCE PRESS 

 Lancaster, Pa. Garrison, N. Y. 



NEW YORK : Sub-Station 84 



FOR SALE 



ARCTIC, ICELAND and GREENLAND 

 BIRD8' SKINS, 



G. DINESEN, BlrdCollector 



TENTH EDITION. 



THE MICROSCOPE, 



by^8iM0N ^Hkhbt GAGB^efOarneU ^mvwsity^^Over 

 2S 1 SSy^fle</e^onl d Rice S>f postpaid!*"* 



COMSTOCK PUBLISHING CO., 



Reptiles, Amphibians 

 and Fishes 



Archives of Psychology 



W. F. H. ROSENBERG, 

 57, Haverstock Hill, London, N. W., 



19. An fcmpir 

 Individual Differ 



LEY. Pp. 146. $L25 ; cloth, 



Visual Ara^y^tt Lights of D 

 Colors and Intensities. David Edgab Kick. 



Pp. 59. 50 o 



; cloth, 75 ci 



lation of visual acuity £ 



Bga to announce the publication of a new Price List 

 So. 15) of Reptiles, Batrachians and Fishes contain- | 

 r 400 species from all parts of the World. This 



No. 11, Birds' Skins, (5,000 species) ; No. 12, Le- I i 

 ppidotera, (5,000 species) ; No. 13, Coleoptera ; No. j j 

 14, Mammals; No. 15, Birds' Eggs. Also list of Cabi- ! * 

 neta, Collecting Apparatus, etc. 



Efficiency. H. I 



\ $1.75. 



tnplete report of an extensive investigation i of t 

 e of caffein on accuracy, speed, and &22*&rLZ 

 i in tests covering a wide range of sensorv, mu^ 



THE SCIENCE PRESS 



er, Pa. Garrison, 1 



Sub-Station 84 : New York 



