SCIENCE.— AD VERTISE3IENTS. 



JUST BEADY. 



The Spirit of Organic Chemistry 



An Introduction to the Cureent Literature of the Subject. 



By Arthur Lachman, Ph.D., Professor of Chemistry in the University of Oregon. With an In- 

 troduction by Paul C. Freer, Ph.D., Professor of General Chemistry in the University of 

 Michigan. Clotb, Crown Svo, $1.50 net. 



" The Spirit of Organic Chemistry" is a supplement to the standard text-book of the sub- 

 ject ; it consists of selected chapters, historically and critically presented. With the chief object 

 in view of enabling its readers to follow the development of organic chemistry in the current 

 journals, it analyzes the chief propositions of the science into their logical component problems ^ 

 interpreting the general in terms of the specific facts. The method employed is the historical ; 

 in each case, the origin, growth, and gradual evolution of the problem are discussed in detail. 

 The topics chosen for presentation have been selected mainly because of their adaptability to the 

 above manner of treatment, but they will be found to include nearly all the fundamental prob- 

 lems and conceptions of this branch of chemistry. Stereochemical doctrines, in particular, have 

 been incorporated to an extent commensurate with their importance. No great familiarity with 

 the subject is jiresupposed, the more difficult points being explained in full detail. 



Experimental Morphology 



By Charles Benedict Davenport, Ph.D., Instructor in Zoology in Harvard University. 

 Part I. Effects of Chemical and Physical Agents on Protoplasm. 



Clotb, Svo, $2.60. 



' ' 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 and the descriptions and 

 criticisms of methods employed in experimentation, and the bibliographical lists at the conclusion 

 of each chapter, contribute materially to the value the book possesses for both the morphologist 

 and physiologist. — J. P. McMurrich in Science. 



Part II. Effect of Chemical and Physical Agents Upon Growth. 



Clotb, Svo. Eeady this Month. $2'00 net. 



The widespread interest in the study of the conditions of development and its experimental 

 control makes it certain that this book will be welcomed by a large number of students of zoology, 

 physiology, botany and agriculture. The general arrangement of the book is the same as that of 

 Part First. Growth is treated apart from difierentiation, as one of the factors of development, 

 and the effect of each agent both upon the rate of growth and its direction is discussed. The part 

 played by the different chemical elements in the growing as opposed to the adult organism is con- 

 sidered in the first chapter, where especial reference is made to the questions of the assimilation 

 of free nitrogen and the stimulation of growth by lecithin and poisons. The important role of 

 water in growth is insisted upon. The marked effect of dense solutions is demonstrated by the 

 aid of new experiments. The hastening effects of electricity upon plant growth and the laws of 

 the effect of light rays of different wavelength and those of temperature are inquired into. The 

 dwarfing effects of small vessels on the size of animals reared in them is also considered. Finally 

 the growth movements of plants in response to chemicals, moisture, contact, gravity, electricity, 

 light and heat, are fully discussed. The tendency of the whole book, which contains consider- 

 able original material, is away from the mechanical explanation of vital processes. Such pro- 

 cesses are to be explained only by the action of causes more complex and remote than most phy- 

 siologists have hitherto conceived them to be. There are 66 illustrations in this part and an 

 index to the first and second parts. 



THE MACMILLAN COMPANY, Publishers, New York 



