28 



work in a few of those branches of plant physiology which are at 

 present attracting attention. Matter already found in textbooks 

 has been almost entirely excluded. The method of treatment is 

 largely historical, and the topics are for the most part confined 

 to those with which the author has had a first-hand acquaintance 

 in the laboratory — especially such topics as are being investigated 

 by the staff of the school of botany, Trinity College, Dublin. 

 Some hitherto unpublished work is included, and throughout the 

 book quantitative data are quoted wherever obtainable. 



There are fourteen chapters dealing, in succession, with the 

 carbohydrates of the Angiosperm leaf in relation to photosyn- 

 thesis, methods of estimating carbohydrates in plant extracts, 

 the carbohydrates of the Thallophyta and Bryophyta in relation 

 to photosynthesis, the pectic substances, osmotic pressure in 

 plants, the osmotic equilibrium in the cell and its surroundings, 

 the permeability of protoplasm, the permeability of organic 

 m(^^ihranes other than protoplasm, the magnitudes of osmotic 

 pressures ai'fd electric conductivities in plants and the factors 

 which influence them, osmotic pressure in relation to plant dis- 

 tribution, morphology, and cell division, the functions of the 

 wood, the plant oxidases, the oxidases in relation to pigmentation 

 and the anthocyan pigments, the oxidases in relation to plant 

 pathology and to technology. 



There is a bibliography of twenty pages, and a good index. 

 The book will certainly be warmly welcomed by those who are 

 pursuing advanced work along related lines, either with classes 

 or as investigators. It serves to put one in convenient touch with 

 a large list of recent titles, and the author's own experience has 

 enabled him to evaluate much of the work he reviews in a 

 manner that will prove helpful. 



C. Stuart Gager 



PROCEEDINGS OF THE CLUB 



October 25, 1916 



The meeting was held in the morphological laboratory of the 

 New York Botanical Garden at 3:30 P.M. Vice-president 

 Barnhart presided. Twelve persons were present. 



