review, the occurrence of proteins in the different parts of plants 

 and their general characteristics, the isolation and preparation of 

 seed proteins, the basic and acid properties of proteins, the solu- 

 bility, precipitation, denaturing, physical constants, products of 

 hydrolysis, and classification of vegetable proteins, some physio- 

 logical relations of vegetable proteins to the animal organism, and 

 the biological relations of seed proteins to one another. An ex- 

 tensive bibliography is appended. 



This book is published in the Collection of Monographs on 

 Biochemistry, edited by R. H. Aders Plimmer and F. G. Hopkins. 



VIII. 



Agricultural Botany. Description and development of plants 

 and of plant-organs. Mechanism of plant-life. 



JOHN PERCIVAL. Agricultural Botany, Theoretical and Pratical. 



Pp. xiv-|-828+fgs. 264. Fourth Ed. Duckworth & C., Lon- 

 don, 1910. 



This is the fourth edition, a proof that the work is apprecia- 

 ted by teachers and students in all countries wherever English is 

 spoken. 



The importance of practical work is recognised as absolutely 

 essential to a proper understanding of the subject, and therefore 

 numerous experiments, 334 in all, illustrative of the principles 

 and facts studied, are introduced in the text. 



As interesting and useful parts may be cited the Methods of 

 crossing plants on Pp. 299-302, the chapters on Farm-Seeds : 

 general and special , as well as those on Weeds and on Diseases 

 of farm-plants. 



The details given concerning the principal agricultural crops 

 are very serviceable. 



D. THODAY and M. G. SYKES. Transpiration current in sub- 

 merged water plants. (Ann. Bot., London, 23, 1909, No. 92 ; 

 E. S. R., March 1910, Washington). 



On account of the possible bearing of the subject on the expla- 

 nation of the ascent of water in tall trees, the authors have made 





