l6o THE PLANT WORLD 



The task proposed has been so well carried out that the 

 work will at once become a necessity, especially to those 

 who have frequent occasion to identify American trees and 

 are not within reach of the facilities offered by herbaria and 

 libraries. 7 he book possesses the great advantage of being 

 written in less technical form than is usual in botanical works 

 and with the numerous illustrations renders the recognition of 

 a large part of the species described a comparatively simple 

 matter. In the nature of things it is not to be expected that 

 all of the 61, oaks ancl i; i thorn trees will be easily recognized 

 except by trained botanists, nor, on the other hand, that all 

 who hnve had such training will l)e able to concur with the 

 writer in his treatment of these groups. 



The brief account of distribution and clear presentation 

 of distinctive characters, the few lines indlcati\e of econom- 

 ical relations, the enumeration of common names now in use, 

 and the illustrations give in handy form just the informa- 

 tion that is wanted and combine to make this one of the 

 most useful of Dr. Britton's works. 



F. M. S. 



The last sentence in the paragraph next to the last on 

 page 112, May number of the PLANT WORLD, should 

 read "For details of distribution, temperature, precipitation, 

 light intensity, etc., will undoubtedly have to be considered, 

 as well as the geological history of the region and of the 

 plants involved." 



Mr. A. A. Heller has been appointed assistant botanist 

 to the Nevada Agricultural Experiment Station and took up 

 his new duties on June i. 



Oswald Weigel, the well-known publisher and book 

 dealer of Leipsic, Germany, has founded a new journal en- 

 titled "1 he Herbarium," which is to be issued at irregular 

 intervals and will be sent free to any one desiring to receive 



