TEACHING AND LEARNING 29 



behind the present state of knowledge, continues to be a book 

 which students consult by preference as a work which tells 

 things as one wishes to know them. Very valuable for its sum- 

 maries of experimental methods and statistical results, for both 

 animals and plants, is DAVENPORT'S "Experimental Morphology." 

 SORAUER'S "Popular Treatise" has distinctive value for the eco- 

 nomic aspects of the subject. SCHIMPER'S "Plant Geography" 

 is indispensable for the ecological phases of physiology. A 

 recent and readable summary of the subject is GREEN'S "Intro- 

 duction to Vegetable Physiology," and of much the same scope 

 is PEIRCE'S "Text -book of Plant Physiology," while for a brief 

 synopsis there is nothing so good as NOLL'S "Physiology" in 

 the Bonn Text-book. CLEMENTS' "Plant Physiology and Ecol- 

 ogy" (which includes the material of his earlier "Research 

 Methods in Ecology") describes some new appliances and 

 methods especially applicable to outdoor work. Again, it is 

 very profitable, and at times indispensable, to consult other 

 works upon the experimental phases of the subject, and for this 

 there are two admirable books, DETMER'S "Practical Plant 

 Physiology" (together with his more recent "Kleines Prakti- 

 kum," still untranslated) and DARWIN and ACTON'S "Practical 

 Physiology"; while MACDOUGAL'S "Practical Text-book of 

 Plant Physiology" is an excellent work, containing some mat- 

 ter not elsewhere accessible. 



The above-mentioned works are such as would be used by 

 students in a college course in Plant Physiology. In addition 

 there are others which, dealing with the simpler and qualitative 

 phases of the subject, and recommending adapted or make- 

 shift appliances, interest especially the teachers in the schools. 

 Among the most recent and excellent of these are ATKINSON'S 

 "First Studies of Plant Life" and MACDOUGAL'S "Elementary 

 Plant Physiology" (to which may be added his non-illustrated 

 "Nature and Work of Plants"). More recently has appeared 

 an excellent German book, LINSBAUER'S "Vorschule der Pflan- 

 zenphysiologie." Most prominent of all books of this type, 

 however, and apparently well-nigh exhaustive of its particular 



