134 THE AMERICAN BOTANIST 



Georjije C. Tlionias. Jr. has issuetl a most complete and 

 u>elul hook i>n rose-growing under the title (^t "Roses tVtr 

 all American Climates." This is not the author's first hook 

 on the rose but in spite of his familiarity with the suhject, 

 he has quoted extensively frcMn other authorities. Tiie 

 roses are among the plants most profoundly influenced by 

 climatic conditions and the book begins appropriately with 

 chapters on the subject. For his purpose the author divides 

 the country into six zones antl for each of these he gives 

 lists of roses that are best suited to them. Then comes 

 descriptions of an immense numl>er of varieties with their 

 time of blooming indicated and other matters of interest add- 

 etl. With this are included comments by a large number oi 

 other rosarians from which one may gain much information 

 as t<) die hardiness of the varieties, the length of the blcwm- 

 ing season, etc. The book ends with chapters on the propa- 

 gation, planting, and general care of roses. There are 24 

 plates in color. The book impresses the reviewer as an ex- 

 tremelv practical volume which all rose-fanciers will be glad 

 to i^ossess. It is published by the Macmillaii Company. Xew 

 York, and the price is $3. 



"Klements of Plant Biology" by A. G. Tansley. Lecturer 

 in Biology at Cambridge University is a sort of special pur- 

 pose lx>ok designed for the use of young medical students in 

 the first half of a year devoted to biolog}-. It forms an in- 

 tr(»duction to the biologA- of plants and is expected to be fol- 

 lowed by work in zoolog>-. The author observes in his pre- 

 face that his classes range from 120 to 250 students and 

 that the btxik has been designed to get results without special 

 attention being given to pedagogic methods. X early all the 

 work called for is with the simple planL< probably a wise 

 course when students are more interested in function than 

 anatomy. Following each chapter are directions for experi- 



