SCIENCE.— AD VER TISEMENTS. 



JUST READY. 



The Arithmetic of Chemistry 



Being a Simple Treatment of the Subject of Chemical Calculations. 



•By John Waddell, B.Sc. (Lond.), Ph.D. (Heidelberg), D.Sc. (Edin.), formerly Assistant to the 

 Professor of Chemistry, University of Edinburg. Clotb, l6mo, go cents net. 



An accurate, simple and systematic treatment of the subject, arranged so as to make the text 

 present a continuous line of argument. Useful tables are appended, the French metric system, 

 comparison of thermometric scales, atomic weights, equations in frequent iise, four- place loga- 

 rithms, etc. 



The Spirit of Organic Chemistry 



An Inteoduction to the Cueeent Liteeatuee of the Subject. 



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

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

 Michigan. Clotb, Crowu Svo, $r.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 speciiic 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 presupposed, the more difficult points being explained in full detail. 



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

 Paet I. Effects of Chemical and Physical Agents on Peotoplasm. 



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. McMueeich in Science. 



Paet II. Effect of Chemical and Physical Agents Upon Geowth. 



Clotb, Svo. Ready this Month. $3.00 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 differentiation, as one of the factors of development, 

 and the effect of each agent both upon the rate of growth and its direction is discussed. There are 

 66 illustrations in this part and an index to the first and second parts. 



THE MACMILLAN COMPANY, Publishers, New York 



