The Popular Science Monthly 
Entered in the Post Office in Lancaster, Pa., as second-class matter. 















CONTENTS OF THE SEPTEMBER NUMBER 
The Zoological Station at Naples. Professor CHARLES 
LINCOLN EDWARDS. 
A Unique Collection of Arithmetics. Dr. Louis Kar- 
PINSKI, 
John Dee and his ‘‘ Fruitful Preface,”? Professor MARY 
ESTHER TRUEBLOOD. : 
The Making of the are erg! Investigator. Professor 
THOS. H. MONTGOMERY, JR. 
The Cause of Social Progress and of the Rate of Interest. 
Professor J. PEASE NORTON. 
Parasitic Culture. Dr. GEORGE E, DAWSON. : 
Centralized Authority and Democracyin Our Higher 
Institutions. Professor Epwin D. STARBUCK. 
The Five-fold Functions of Government. Dr. W J 
McGErr, ; “es 
Associate Members of American Societies, Professor 
EDWARD C, PICKERING. 
CONTENTS OF THE AUGUST NUMBER 
The Past and Present Status of the Ether. Professor 
ARTHUR GORDON WEBSTER. 
Physiologic Light. F. ALEX, McDERMOTrT. 
Instinct and Intelligence in Birds. Professor FRANCIS 
H. HerReIox, 
The Paleontologic Record : Anatomy and Physiology in 
Invertebrate Extinct Organisms, RUDOLF RUEDE- 
MANN. Contributions to Morphology from Paleon- 
tology, Professor WILLIAM BULLOCK CLARK. Re- 
lation of Embryology and Vertebrate Paleontology, 
Professor RicHARD SwAN LULL, 
Observations on the Earthquake of May 26, 1909. Pro- 














































L. M F 4 
: Paleontologic Record: Ontogeny, a Study of the 
pe i oe i a a ALTER G. BEACH. - eae of ane Features in determining Phylogeny, 
Bacteriology and Parasitology in Relation to Avian Professor F, B. Loomis: Paleontology and Ontogeny, 
Diseases. Dr, GEORGE EDWARD GAGE, 
The Réle of Selection in Plant Breeding. Professor 
EDWARD M. Fas. 
The Progress of Science: The Work of the New York 
Zoological Society ; Death among American Men of 
Science ; Scientific Items, 
Professor A. W. GRABAU; Paleontology and the 
Recapitulation Theory, Professor E. R. CUMMINGS ; 
Vertebrate Paleontology and the Recapitulation 
Theory, L. Hussakor, : Ad ‘ 
The Progress of Science: The Scientific Laboratories of 
Princeton University ; Comparative Psychology in 
America; Scientific Items. ‘ 







8@> The MONTHLY will be sent to new subscribers for six months for One Dollar. 
SUBSCRIPTION ORDER 
To THE SCIENCE PRESS, 
Publishers of THE POPULAR SCIENCE MONTHLY, 
Sub-Station 84, New York City. 
Please find enclosed check or money order for three dollars, subscrip- 
tion to THE POPULAR SCIENCE MONTHLY for one year, beginning 
October, 1910. 
Please find enclosed from a new subscriber one dollar (sent at your 
risk), subscription for six months to THE POPULAR SCIENCE 
MONTHLY, beginning October, 1910. 







a renee: 



Address 

AoA ORR ROR eRe esenenenndanssceee schalaietelatalalalettaheteetetetee tte Te 



POLAR ENERO ROMEO ERR SNS Bese nenneedsneeee: 

Single Numbers 30 Cents Yearly Subscription, $3.00 
THE SCIENCE PRESS 
Garrison-on-Hudson, N. Y. 41 North Queen St., Lancaster, Pa. 
. Sub-Station 84; NEW YORK 




PRESS OF THE NEw ERA PRINTING COMPANY 
