SCIENCE— ADYEBTISEMENTS 



CORNELL UNIVERSITY 

 MEDICAL COLLEGE 



First Avenue and Twenty-eighth Street 

 NEW YORK CITY 



The first year of the course is also 

 offered at Ithaca, N. Y., subsequent 

 years at New York City only. 



For Information Address 

 THE SECRETARY 



THELCO CONSTANT TEMPERATURE 



DRYING OVENS 



LARGE DOUBLE WALL THELCO OVEN 



In the laboratory as well as in the mill we must con- 

 stantly apply economics. If for the work in hand a less 

 expensive article will do, use it by all means. Among our 

 products you will find a wide variety suitable for the 

 different conditions at hand. 



Manufactured by 

 The Thermo Oectric Instrument Co. 



8 Johnson St. Newark, N. J. 



Northwestern University 



MEDICAL SCHOOL 



Situated in Chicago in close proximity to im- 

 portant Hospitals with an abundance of clinical 

 material. 



ADMISSION REQUIREMENTS— Two year 

 eluding a Batisfactory course in Phyai 

 or Zoology, and French or German. 



of College credit 1b> 

 ;■, ChemiatrT. BiolofT 



COURSE OF STUDY— 1 



jithe 



ding to the degree of Doctor of Medi- 

 the Medical School «nd a fifth yeai 

 in approved hospital or devoted to re- 

 search in some branch of Medical Science. 

 GRADUATE INSTRUCTION— in couraes leading to the degree of 



Master of Arta or Doctor of Philosophy. 

 RESEARCH FOUNDATION— The James A. Patten Endowment 

 for Research affords unuaual opportunities for advanced 

 students of Medical Science to pursue special investigatioiM. 

 RESEARCH FELLOWSHIPS— Four fellowshipa of the yalao oi 

 $500 each are awarded annually to promote scholarly re- 

 Tuition fees of the first and second years, $190.00 a year. 

 The third and fourth years, $200.00 a year. 



For information address 



C. W. PATTERSON, Registrar 



2421 South Dearborn Street, Chicago, Illinois 



The 



li c roscopc 



By SIMON H. GAGE of Cornell University 

 t3th Edition, Published December, 1920 



Id this edition, special emphasis is put upon tlie Dark-Field 

 Microscope. POSTPAID 83.00. 



COMSTOCK PUBUSHING CO., Ithaca. N. Y. 



Marine Biological Laboratory 



WOODS HOLE, MASS. 



Biological Material 



^^^T OF Y^ I ZOOLOGY. Preserved mate- 



^ ««-'«^'f, rial of all types of animals for class 

 , n (irk and for the museum. 



i 2. EMBRYOLOGY. Stages of 



*^ , me invertebrates, fishes (includ- 



ng Acanthias, Amia and Lepidos- 



tus). Amphibia, reptiles aad some 



I mammals. 



3. BOTANY. Preserved mate- 

 ria! of Algae, Fungi, Liverworts, 

 Mosses, Ferns and Seed Plants. 



» MICROSCOPE SLIDES in Bacteriology, 

 Botany and Zoology. 



S. LIFE HISTORIES, Germination Studies, 

 and Natural History Groups. 



Catalogues furnished on application to 



GEORGE M. GRAY, Curator 



WOODS HOLE, MASSACHUSETTS 



