AND GENERAL CONSIDERATIONS. 3 



form in the service of plant-^i/*e, then again we are concerned with 

 a force effect which is bound to a specially constituted plant-sub- 

 stance and is therefore physiology. 



Throughout the arrangement of this book a strong effort 

 is made to adhere as strictly as possible to the combination of 

 such methods of investigation as have just been indicated. How- 

 ever, some attention must be given to the didactic uses of the book. 

 Due regard shall be given to a proper summarizing. In its entirety 

 we have adopted that disposition of subject-matter which Schwen- 

 DENER has so efficiently tested and found useful in the academic 

 course of study. His arrangement is as follows : 

 I. The cell. 



II. Tissues. 



A. Structure of tissues and simple organs. 



B. Differentiation of tissues (physiological anatomy of 

 simple organs). 



III. Systems of organs. 



IV. Reproduction. 



V. General chemistry and physics of plant-life, 

 YI. System of plant classifcation. 



