80 THE AMERICAN BOTANIST 



piration, photosynthesis, secretion, excretion, storage, and re- 

 production, all have chapters devoted to them, after which 

 come chapters on the use of the microscope, reagents and proc- 

 esses, the microchemistry of plant products and the adultera- 

 tions in foods and drugs. The book is now an octavo of 400 

 pages with more than 150 illustrations. The price is $2.50 net. 



A loose-leaf "Manual of Soil Physics" containing forty- 

 four exercises by P. B. Baker and H. J. Young, of the Uni- 

 versity of Nebraska, has been issued by Ginn & Co. Following 

 the directions for performing each experiment, there are several 

 questions regarding the results obtained. The authors state 

 that the manual has sufficient material in it for two semesters 

 work, but to the reviewer it would seem as if a class might 

 cover the ground in much less time. The experiments are those 

 usually given in high school classes. Teachers of Agriculture 

 should find them of considerable value. The price of the note- 

 book in the "Biflex" binder is 65 cents. 



