OUR FORESTS 143 



ADVANCED 



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

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



Book Company. 



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

 Strasburger, Noll, Schenck, 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, 18, 20, 26, 27. 



