REVIEWS 



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7. Ring-porous woods are more numerous in the temperate zone 

 than in the tropics ; in conformity with a higher percentage of de- 

 ciduous trees. 



8. Wood fihers have usually thicker walls and larger diameter in 

 tropical woods than in those of the temperate zone. 



9. Metatracheal parenchyma is more frequent in the tropics than in 

 the temperate zone. A. K. 



Identification of the Important Japanese Woods by Anatomical 

 Characters. By Ryozo Kanehira. Bureau of Productive Industries, 

 Government of Formosa. Taihoku. 1921. Pp. 104, Plates IX. 



This is a supplement to "Anatomical Characters and Identification 

 of Formosan Woods with Critical Remarks from the Climatic Point 

 of View With 300 Micrographs," by the same author. He describes 

 181 Japanese species in the same detail as he did the Formosan woods. 

 A key for identifying woods by their anatomical structure and 54 

 reproductions of photomicrographs are included. It does not include 

 all the economic woods of Japan, and a few included from neighboring 

 islands. A. K. 



