Experimental Zodlogy 
By THOMAS HUNT MORGAN, Professor of Experi- 
mental Zodlogy, Columbia University 
Cloth, 454 pp., 8vo, $2.75 net 
“The author long ago won his spurs in this field, through his 
unrivaled researches in the phenomena of regeneration; and he 
has now proved himself a master of compilation —selecting the 
most significant experiments carried on in various countries, 
weighing them fairly, and summing up with a conservatism which 
is perhaps the most valuable feature of the book. The thorough- 
ness and lucidity of the work make it serve three distinct 
purposes: the intelligent layman without any previous knowledge 
of the subject may read and appreciate any part of it; the student 
of experimental zodlogy will find it a veritable vade mecum; and 
the advanced scientist will be glad to refer to the generous 
summaries of literature relating to each subject.” — Nation. 
“Professor Morgan has, however, done much sound and some 
brilliant work. In his special field, the regrowth of amputated 
parts and the relation of this property to the general theory of 
evolution, his experiments have become classic, and he is himself 
one of the first authorities in the world. His own eminence in the 
field, combined with a simple, straightforward style, and a just 
and sympathetic appreciation of the work of other men, even 
when their opinions are opposed to his own, render him especially 
well fitted to sum up the general results of the new science. 
“This he has accomplished with marked success in the work 
before us. He has succeeded in bringing together a large body 
of fact without becoming dull; without being fatuously ‘ popular,’ 
he has been untechnical and clear.” — Boston Transcript. 
The Protozoa 
By GARY N. CALKINS, Ph.D., Instructor in Zodlogy, 
Columbia University 
Cloth, 347 pp., 8v0, $3.00 net 
“The author has not aimed at putting forward an exhaustive, 
severely scientific treatise upon the group in question. His work 
may be described rather as a simple and intelligible introduction 
to the study of the Protozoa and of the many fascinating biological 
problems connected with, or illustrated by, this subdivision of the 
animal kingdom, in such a way as to awaken the interest of the 
beginner, no less than to strengthen the hands of the expert.” 
— Nawre. 
PUBLISHED BY 
THE MACMILLAN COMPANY 
64-66 Fifth Avenue, New York 
