





r 



* 



1917] CURRENT LITERATURE 155 



and the importance of their conservation made clear. The harvesting and 

 ' utilization of the timber crop is described in an interesting manner, as well as 



the training and duties of the forester. Some attention is given to such forest 

 industries as maple sugar making, nut growing, resin production, and wood 

 distillation. A word is said about the value and care of shade trees, and a 

 glance is taken at the future possibilities of forestry, everything being treated 

 t in a non-technical way likely to interest the "Boy Scout" and many of his 



I elders. The latter part of the book is devoted to very brief descriptions of some 



50 trees, each being illustrated by a small drawing of leaves and flowers or fruit. 

 I While neither a textbook nor a scientific treatise, it is interesting and seems 



well suited to the purpose of interesting the public and more particularly the 

 boys, in the forest and the forester as they concern the happiness and pros- 

 perity of our land. — Geo. D. Fuller. 



Soil bacteriology, — A laboratory manual of soil bacteriology by Fred 3 

 is intended as a guide to teachers and students in courses given in soil bacte- 

 riology. The subject is logically developed and directions are given in clear, 

 concise form. There is perhaps no branch of bacteriology so intimately 

 associated with chemistry as soil bacteriology, and therefore considerable 

 I attention is given to this phase of the subject. There are a number of excellent 



I illustrations in the book, and one of the most valuable features is the fairly 



complete assortment of recipes for preparing culture media suitable for the 

 study of soil bacteria. Special sections deal with methods of quantitative and 

 qualitative chemical methods of analysis. Provision is made at the conclusion 

 . of exercises for the student to record results in tabular form, a feature which 

 adds materially to the value of the book- 

 It is being realized in agricultural schools that the study of soil bacteriology 

 is of eminent importance, and this manual will undoubtedly be appreciated by 

 those interested in such courses. — P. G. Heinemanx. 



North American flora. — The first part of Vol. 21 begins the Chenopodiales 

 by presenting the Chenopodiaceae monographed by Standley. 4 There are 

 195 species recognized, distributed among 27 genera. A new genus (Meiomeria) 

 is based upon Cheno podium stellatum S. Wats. The large genera are A triplex 

 (96 species, 20 of which are new), Cheno podium (52 species, 13 of which are 

 new), and Dondia (20 species, 7 of which are new). New species are also 

 described in Salicomia (2) and Efidolepis. One of the remarkable features of 

 the family is the number of small genera, 13 being represented by a single 

 species, and 4 by 2 species. In fact, 177 of the 195 species are included in 4 

 of the 27 genera. 



Fred 



i2mo. pp. 170 



Philadelphia: Saunders Co. 1916. $1.25. 



4 Xorth American Flora 21: part 1. pp. 1-93. Chenopodiales: Chenopod 

 by P. C. Standley. New York Botanical Garden. 19 16. 



