OUR FOKESTS 143 



ADVANCED 



Apgar, Trees of the United Slates, Chaps. II, V, VI. American Book Company. 

 Coulter, Barnes, and Cowles, A Textbook of Bolaiiy. Part. I and Vol. II. American 



Book Company. 

 Goebel, Organography of Plants, Part V. Clarendon Press. 

 Strasburger, Noll, Sehenck, and Schimper, A Textbook of Botany. The Macmillan 



Company. 

 Ward, Timber and Some of its Diseases. The Macmillan Company. 

 Yearbook, U.S. Department of Agriculture, Division of Forestry, Buls. 7, 10, 13, 16, 



17, IS, 20, 26, 27. 



