ECONOMIC WOODS OF THE UNITED STATES 115 



FLETCHER, W. F. : The Native Persimmon. Farmers' Bui. 685, U. S". Dept. 

 Agr., 1915. 



"Hickory: 



BOISEN, ANTON T., AND NEWLIN, J. A.: The Commercial Hickories. Bui. 

 80, U. S. Forest Service, 1910. 



HATCH, CHARLES F.: Manufacture and Utilization of Hickory, 1911. Cir. 

 187, U. S. Forest Service, 1911. 



DETWILER, SAMUEL B.: The Hickories. Amer. For., 22:272:451-457, 

 Aug. 1916. 



^Walnut: 



SUDWORTH, GEORGE B., AND MELL, CLAYTON D.: Identification of North 

 American Walnut Woods. Hardwood Record, Sept. 10 and 25, 1914. 



RECORD, SAMUEL J. : The Walnuts and the Hickories. Hardwood Record, 

 Apr. 25, 1913, pp. 27-29. 



46 Swietema: 



MELL, C. D.: True Mahogany. Bui. No. 474, U. S. Dept. Agr., 1917. 



RECORD, SAMUEL J.: Mahogany and Some of Its Substitutes. Journ. 

 Forestry, 17: 1: 1-8, Jan. 1919. 



SUDWORTH, GEORGE B., AND MELL, CLAYTON D.: "Colombian Ma- 

 hogany": Its Characteristics and Its Use as a Substitute for True Mahogany. 

 Cir. 185, U. S. Forest Service, 1911. 



BUSCH, P.: The Commercial Mahoganies. Tropenpflanzen. 15:9:479- 

 493, 1911. 



DIXON, HENRY H. : Mahogany, and the Recognition of Some of the Differ- 

 ent Kinds by Their Microscopic Characteristics. Sci. Proc., Royal Dublin 

 Soc., 15 (n. s): 34: 431-486, Dec. 1918. 



47 Eucalyptus: 



BETTS, H. S., AND SMITH, C. STOWELL: Utilization of Calif ornia Eucalypts. 

 Cir. 179, U. S. Forest Service, 1910. 



TIEMANN, H. D.: Eucalyptus Lumber. Hardwood Record, Sept. 25 and 

 Oct. 10, 1913. 



WOODBURY, T. D.: Yield and Returns of Blue Gum in California. Cir. 

 210, U. S. Forest Service, 1912. 



^Evergreen Oaks: 



BAILEY, IRVING W.: Notes on the Wood Structure of the Betulaceae and 

 Fagacese. For. Quarterly, 8: 2: 178-185, June 1910. 



SUDWORTH, GEORGE B., AND MELL, C. D.: The Identification of Important 

 American Oak Woods. Bui. 102, U. S. Forest Service, 1912. 



^Quercus densiflora: 



JEPSON, WILLIS LINN, AND BETTS, H. S.: California Tanbark Oak. Bui. 

 75, U. S. Forest Service, 1911. 



50 Carpinus: 



BAILEY, IRVING W.: Notes on the Wood Structure of the Betulacese and 

 Fagacese. For. Quarterly, 8: 2: 178-185, June 1910. 



51 Platanus: 



BRUSH, WARREN D.: Distinguishing Characteristics of North American 

 Sycamore Woods. Bot. Gaz., 64: 6: 480-496, Dec. 1917. 



