224 THE PIvANT WORLD 



The Role of Diffusion and Osmotic Pressure in Pi^ants. By 

 Biirtoti Edivard Livingston. Decennial Publications of the University 

 of Chicago, 2 Ser., Vol. Ill, pp. 149. Chicago, 1903. 



In the work before us Dr. Livingston has given an excellent and 

 much-needed general treatment of the diffusion and osmotic pressure in 

 plants. The work is divided into two parts : the first treats of the phys- 

 ical phenomena bearing on the subject, such as matter and its states, 

 diffusion, liquid solutions, ionization, and osmotic phenomena. Part 

 second discusses the physiological aspects of the subject, as turpidity, 

 absorption and transmission of water, absorption and transmission of 

 solutes, and the influence of the osmotic pressure of the surrounding 

 medium. This part of the work contains also the results of the author's 

 own investigations. 



The treatment of the whole subject is clear and concise and forms an 

 admirable addition to the literature of physiological botany. It will be 

 found indispensable to all students along these lines. c. L. S. 



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