SCIENCE 



NiwBKKiEs Frtt>ay March 14 1913 single copi.b, 15 cxs. 



YOL. XXXVIL No. 950 T KIDAY, iVXAKCM It, 1»10 Ankual BuBSOKipnoN, 85.00 



The Principles of 



BIOLOGY 



By J. IRVIN HAMAKER, A.M., Ph.D. 



Professor of Biology in the Randolph-Macon Woman's College. 



Will be published 

 EARLY IN APRIL 



Thoroughly illustrated with many Original Pictures. 



It is a one year course preseDting the salient features in the organism of plants and animals, 

 and bringing out important biological principles. It is designed to supplement practical 

 work in the laboratory and field, and to relieve the student of much note taking. Purely 

 descriptive matter is reduced to a minimum and examples are omitted because the teacher will 

 have a fund of local and familiar illustrations from which to draw, to the greater benefit of 

 the student. 



The Subject is Peesented in Three Paets : 



1. The structure and function of plants. 



The method in this part is to build up from the 

 familiar to the less familiar. 



2. The structure and function of animals. 



The discussion here is largely by comparison. 



3. General biological questions ; Protoplasm and its activi- 



ties, development, evolution, special adaptations, etc. 

 No laboratory work is included in the discussion, thus giving the text greater continuity 

 and readability. An outline of experiments ia inserted at proper points in the book, planned 

 to precede the study of the text matter. 



The book is intended as a first course both for students who intend to continue in the 

 science and for those who desire merely an elementary cultural view of the subject 



P. BLAKISTON'S 2 



PHILADELPHIA 



SON 

 & 



CO. I 



