JUST OUT 
American Permian Vertebrates 
By SAMUEL W. WILLISTON 
[, = HIS work comprises a series of monographic studies, with briefer 
| 4 notes and descriptions of new or little-known amphibians and 
e 2S) reptiles from the Permian deposits of Texas and New Mexico. 
EGS The material upon which these studies are based was for the 
most part collected during recent years by field parties from the University 
of Chicago. The book is offered as a contribution to knowledge on the 
subject of ancient reptiles and amphibians, with ‘such summaries and 
definitions based chiefly on American forms as our present knowledge per- 
mits. The work is illustrated by the author. 
Postpaid $2.68 
228 pages 8vo, cloth Net $2.50 
THE es OF CHICAGO PRESS 
CHICAGO - B -. ILLINOIS 
Contributions to Medical Science 
By Howard Taylor Ricketts 
Published as a Tribute to His oo, A His 
veers) under the Auspices of th 
hicago Pathological Society 
R. RICKETTS —e of typhus fever in the 
City of Mexico, May 3, Ioro. e was at 
ed by an insect, and thus point ace out the 
way for preventive measures. ese achieve- 
earlier ocky 
Mountain spotted fever, give Dr. Ricketts a high 
and ri able place on the records of medical 
The p t volume contains thirty papers 
on these and alii allied topics. Iti is rich in informa- 
tion of immediate ke and i in suggestions to 
— Baden goric Ms is also an impressive 
toa hose life = ay 
laid dent in the ¢ eves of humani 
508 pp., 8vo cloth; net $5.00, domestic postage 3 3C. 
The University of Chicago Press 
Chicago Illinois 
A Laboratory Guide 
in Bacteriology 
By PAUL G. HEINEMANN 
Second Edition, Enlarged and Revised 
I ———— 
The Guide is confidently offered in the 
belief that it will commend itself, even ait 
than did the first edition, to elementary studen 
in medical bacteriology, the bacteriology oO 
the 
bacteriology and in 
water and milk, soil ba ie val cnet 
H 
216 PAGES, mo, co 
POSTPAID 
The University of Chicago Press | 
Chicago, Illinois 
