226 NOTES AND COMMENT 



tions of the use of various reagents and imbedding and staining methods, 

 as well as the specific descriptions of the best methods for use in the 

 several plant groups, and the directions for the laboratory management 

 of living material, make this an invaluable book for students and 

 teachers of the morphology of plants. 



Among the papers which will appear in early forthcoming issues of 

 The Plant World are the following: A Study of the Root Systems of 

 Prairie Plants of Southeastern Washington, by J. E. Weaver; Acid 

 Accumulation and Destruction in Large Succulents, by E. R. Long; 

 The Effect of Vanillin as a Soil Constituent, by J. J. Skinner; A Rela- 

 tive Score Method of Recording Comparisons of Plant Conditions and 

 other Unmeasured Characters, by E. E. Free; and Notes on the Ances- 

 try of the Beech, by Edward W. Berry. 



The Rural Science Series, published by the Macmillan Company, 

 now comprises some thirty-four hand-books and text-books, the most 

 recent of them being the thoroughly revised twentieth edition of Pro- 

 fessor Bailey's Principles of Fruit-Growing. The volume is not only 

 concerned with the principles of the subject, but is even to a greater 

 extent devoted to a complete exposition of the practices of fruit growing, 

 from the selection of an orchard site to the packing of the ripened crop. 



