10 PLAN AND PURPOSE OF THIS BOOK 



extracts from his excellent article in School Science on the effects 

 of Alcohol. R. W. Coryell and J. W. Tietz, two of my former 

 pupils, made several of the photographs of experiments. 



At the end of each of the following chapters is a hst of books which have 

 proved their use either as reference reading for students or as aids to the 

 teacher. Most of the books mentioned are witliin the means of the smaU 

 school. Two sets are expensive : one, The Natural History of Plants, 

 by Kerner, translated by Oliver, published by Henry Holt and Company, 

 in two volumes, at ill ; the other, Plant Geography upon a Physiological 

 Basis, by Schimper, pubhshed by the Clarendon Press, S12 ; but both 

 works are invaluable for reference. 



For a general introduction to physiological biology, Parker, Elementary 

 Biology, The MacmUIan Company ; Sedgwick and Wilson, General 

 Biology, Henry Holt and Company ; and \''erworn, General Physiology, 

 The Macmillan Company, are most useful and inspiring books. 



Two books stand out from the pedagogical standpoint as by far the most 

 helpful of their kind on the market. No teacher of botany or zoology can 

 afford to be without them. They are : Lloyd and Bigelow, The Teaching 

 of Biology, Longmans, Green, and Company, and C. F. Hodge, Nature 

 Study and Life, Ginn and Company. Other books of value from the teach- 

 er's standpoint are : Ganong, The Teaching Botanist, The MacmUlan Com- 

 pany ; L. H. Bailey, The Nature Study Idea, Doubleday, Page, and Com- 

 pany, and McMurry's How to Study, Houghton, MiiHin Company. 



