PRINCIPLES OF BOTANY 



By JOSEPH Y. BERGEN, recently Instructor in Biology in the English High 

 School, Boston, and BRADLEY M. DAVIS, Assistant Profes- 

 sor of Botany in the University of Pennsylvania 



i2mo, cloth, 55 5 pages, illustrated, $1.50 



A LABORATORY AND FIELD MANUAL OF BOTANY 



By JOSEPH Y. BERGEN and BRADLEY M. DAVIS 



PRINCIPLES OF BOTANY is a work especially suited 

 for college and normal-school classes and for those 

 high schools that are equipped to give more than an average 

 course in this subject. It claims superior merit in the mate- 

 rial which it offers for a consecutive series of studies of 

 representative spore plants, so treated as to outline the 

 evolutionary history of the plant world. 



Some of the characteristics which make this volume 

 superior to others of its kind are : 



L That it presents more adequately than any other on the market the 

 subject-matter demanded by the College Entrance Examination Board 

 and the state universities of the middle and far West. 



XL That no other botany of its scope leads up to the more difficult 

 portions of the subject in so easy and untechnical a manner. 



III. That it is the first book of its class to present ecology as a con- 

 nected subject and not as a series of snap-shot studies. 



IV. That it is the only botany which gives a clear idea of the dis- 

 tribution of vegetation in the United States, with the reasons for it. 



V. That it is better and more fully illustrated than any other book 

 for beginners in botany. 



With mature students a half year's course may be framed 

 from the book. 



GINN & COMPANY Publishers 



