THE AMERICAN BOTANIST 177 



interest to the text. iCach chapter ends with a list of refer- 

 ences to which readers may turn for additional information. 

 The woodland \ohnne does not discuss the individual species 

 which make up the forest hut this is provided for hy three 

 additional volumes de\<»te(l respectively to "Northern Wood- 

 lot 'JVees," "Southern Wdodland Trees" and "W estern I'orest 

 Tree^ " One therefore adds to the forestry hook the tree 

 manual or manuals that refer to his region, in the manuals 

 ade(|uate keys are i^'wen for identifying the trees, and these 

 are helped out hy good line drawings of the leaves and other 

 characteristic parts of each species. The trees are also 

 descrihed under the heads form, occurance, distinctive char- 

 acteristics, wood, and uses. The paragrai)hs on distinctive 

 characteristics are especially helpful. In case where certain 

 species occm- in more than one of the regions selected, tlie 

 descriptions are found in the hook relating to each region 

 making each manual complete in itself. The price of "Farm 

 W'ocxllands" is $2.00 and that of the manuals is $1.20 each. 

 All are puhlished I)y the World Book Company of "^'onkers, 

 N. Y. 



A most compendious account of the life-processes of the 

 higher forms of vegetatif)n, is the volume hv MacGregor 

 Skene of the University of Aherdeen on the "Biology of 

 Flowering Plants." This is one of a series of "Biological 

 Text-books." under the general editorship of J. Arthur 

 'I'hompson. which is being issued by the Macmillan C()m[)anv. 

 The volume merely attempts to describe the activities of the 

 seed-plants and though it contains but six chapters, runs to 

 more than 500 pages and re(|uired the consulting of more 

 than a thousand volumes. Most of these are listed in the 

 bibliography at the end of the book. The six chapters deal 

 with the absorptioti of water and salts, assimilation and 

 transpiration, special modes of nutrition, protection, repro- 



