80 THE PLANT WOKLD 



as might be inferred from the title, it is mainly devoted to the common 

 edible species. The information concerning this is very complete, in- 

 deed, beginning with the preparation of the proper beds for planting it, 

 the care during growth, including insect and fungus enemies, and finally 

 the harvesting of the crop. It is well written and will undoubtedly prove 

 of great value to all who contemplate the commercial raising of the crop. 

 It is adequately illustrated throughout. F. H. K. 



Elementaey Plant Physiology. By Daniel Trembly MacDougal, Ph. 



D., Director of the Laboratories, New York Botanical Garden. 



12 mo., 138 pp., 108 illustrations. Longman, Green & Co., New 



York, 1902. 

 This book the author tells us is intended to supply the place of his 

 " Experimental Plant Physiology" which is now out of print. The book 

 contains seven chapters as follows : I. Introductory. II. Growth. 

 III. Reproduction and Germination. IV. Exchange and Movement of 

 Gases and Liquids. Y. Nutrition. YI. Respiration, Digestion and 

 Fermentation. YII. Stimulation and Correlation. The book is de- 

 signed for a laboratory manual. Concise and comprehensive directions 

 are given for carrying out experiments demonstrating the principal 

 functions of plants. The numerous illustrations add much to the value 

 and attractiveness of the volume. Physiological botany is at present 

 receiving more of the attention it deserves than it ever has received be- 

 fore, and this volume, which should be in the hands of every teacher of 

 the subject, should tend to increase its popularity and promote its pro- 

 gress. C. L. S. 



