217 



it is implied that starch-accumulation is synonymous with photo- 

 synthesis. A paragraph on page 433 is headed "Etiolation," 

 but this term is not referred to or defined in the paragraph nor 

 •elsewhere in the book, nor does it occur in the index. 



At numerous places the literary style and the English are such 

 as to suggest that the text might have been dictated and not 

 subsequently revised with sufficient care. Thus we find "this 

 ■element" (p. 195), without any element being previously referred 

 to in the paragraph ; " The strong flavor of radishes . . . are also 

 modified " (p. 426) ; " It is not always possible to distinguish posi- 

 tively between the two types, or the movement may be the 

 result of conjoint stimulus" (p. 495). 



However, the fact that is was so easy to single out the above 

 points only means that the book is one of conspicuous merit. 

 Since Johnson's "How Crops Grow" and "How Crops Feed," 

 nothing of similar nature has appeared, and Professor Duggar 

 has rendered distinct service in bringing forward in concrete 

 form, with a carefully worked out solution, the whole question 

 of a suitable presentation of plant physiology to agricultural 

 students. Especially has the author made a very happy choice 

 in the topics selected and excluded, and the book cannot help 

 but conduce to clearer thinking, and a more intelligent practice 

 on the part of the student and reader. 



The text has distinct vitality because so much of it comes 

 direct from the author at first hand, the illustrations are apt, 

 and the book is sure to meet with the wide and warm welcome 

 which it justly merits. 



C. Stuart Gager 



TAYLOR'S REVIEW OF THE PHYTOGEOGRAPHIC 

 SURVEY OF NORTH AMERICA: A REPLY 



The long and detailed review of my recent book in Torreya 

 covering ten pages of the September, 191 1, number of the journal 

 is a surprising one, because the mark of a true critic is to give 

 the other man the benefit of a doubt. Some of the points taken 

 by Taylor in his review are justly made, but many of them are 



