EXPERIMENTAL MORPHOLOGY. 



BY 

 CHARLES BENEDICT DAVENPORT, Ph.D., 



Instructor in Zoology in Harvard University. 



PART I. 



EFFECT OF CHEMICAL AND PHYSICAL AGENTS UPON 



PROTOPLASM. 



8vo. Cloth. Price $2.60, net. 



It is intended to serve as an introduction and guide to the study and 

 development of the individual regarded as a complex of processes rather than 

 a mere succession of different forms. It brings together under appropriate 

 heads the published observations hitherto made on the subject, laying special 

 stress upon the results and methods of those investigations \\hich have a 

 quantitative value. The central idea of the work is that ontogeny is a series 

 of reactions to chemical and physical agents. This determines the scope of 

 the work, and the division of the effects of agents under the heads I. Proto- 

 plasmic Movements ; II. Growth; III. Cell Division ; IV, Differentiation. 



" The thoroughness which characterizes this important treatise renders it the most 

 useful annotated bibliography of the subject which has appeared. But it is far more 

 than an expanded bibliography. With a good sense of proportion, Dr. Davenport 

 has placed at the command of biologists, not merely the results which have already 

 been secured in this fascinating field, but he has pointed out certain directions which 

 new investigations ought to pursue if they are to be fruitful. The sequence of sub- 

 jects does not commend itself to us as in all respects the best, for it appears as if the 

 effect of molar agents and of varying moisture upon protoplasm might well precede 

 instead of follow the action of chemical agents and the molecular forces, but, aside 

 from this, one can go 'with the author along a straight path, until he comes to the 

 end of this part now before us; namely, the action of light and heat upon protoplasm. 

 The general considerations of the effects of chemical and physical agents upon proto- 

 plasm, which constitute the closing chapter of this part, are carefully stated, and 

 kept on relatively safe groun.l; they are at the same time of a distinctly suggestive 

 character, which must aid in carrying out the chief wish of the author; namely, the 

 stimulation of further inquiries in this attractive and fertile field. Botanists owe to 

 Dr. Davenport very sincere thanks for the exhaustive manner in which he has pre- 

 sented the botanical side of his subject." American Journal of Science. 



"The material which is discussed has been well digested and is well arranged, 

 and the style is on the whole clear and concise. The book is a readable one, anil the 

 descriptions and criticisms employed in experimentation, and the bibliographical lists 

 at the conclusion of each chapter, contribute materially to the value the book pos- 

 sesses for both the morphologist and the physiologist." Science. 



THE MACMILLAN COMPANY, 



66 FIFTH AVENUE, NEW YORK. 



