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REVIEWS 



HacDougal's Elementary Plant Physiology * 



Dr. MacDougal's new elementary text-book of plant physiology 

 s logically a revised edition of his Experimental Plant Physiology 



brought out in 1895, but a 

 consideration of its contents 

 shows that it is in fact a new 

 book differing widely both in 

 method of treatment and ar- 

 rangement of subject matter 

 from the earlier text. It is 

 also to be said that the new 

 book is an elementary manual 

 adapted to the needs of sub- 

 collegiate grades and that in 

 method of attack and sequence 

 of the subject matter it is alto- 

 gether different from the ad- 

 vanced text-book by the same 

 author. The program of the 

 contents is as follows : Chapter 

 I. Introductory. II. Growth. 

 III. Reproduction and Germi- 

 nation. IV. Exchanges and 

 Movements of Liquids and 

 Gases. V. Nutrition. VI. 

 Respiration, Digestion and 

 Fermentation. VII. Stimula- 

 tion and Correlation. 



FlG. 64. Apparatus for demonstration 



of relation of plants to atmosphere. A, Thesefeaturesareclearlypre- 



candle. B, match held in end of bent sented by text, illustration and 



glass rod. C, sanded paper. D, position exper i me nt. The text is so ar- 



of glass rod when match is applied to candle. 



ranged that the student must 



gain self-reliance in performing the experiments, and by observation 



*MacDougal, I). T. Elementary Plant Physiology. Svo. Pp. i-xi + 138. Lon- 

 don and New York, Longmans, Green and Co. 1902. $1.20. 



