238 PASTORAL AND AGRICULTURAL BOTANY 



FREEMAN, W. G., CHANDLER, S. E. and HENRY, T. A.: The World's Commercial Prod- 

 ucts. Boston, Ginn and Company, 1911. 



HALL, A. D.: The Book of Rothamsted Experiments. New York, E. P. Button and 

 Co., 1905. 



HARSHBERGER, JOHN W.: The Accumulation of Soil Nitrogen. Bulletin 151, De- 

 partment of Agriculture of Pennsylvania, 1906, 76-84, Proceedings of the Spring 

 Meeting of the State Board of Agriculture and Farmers' Annual Normal Institute 

 held in the Court House, Clearfield, Penna., May 29 to 31, 1906; A Text Book of 

 Mycology and Plant Pathology. Philadelphia, P. Blakiston's Son & Co., 1917; 

 28-31; Maize: A Botanical and Economic Study. Contributions from the Bo- 

 tanical Laboratory, University of Pennsylvania, i, 180-198, 1893. American 

 Food Plants, Past and Present. Public Lectures, University of Pennsylvania, v : 

 215-232, 1917-1918. 



KELLERMAN, KARL F. and ROBINSON, T. R.: Inoculation of- Legumes. Farmers' 

 Bulletin 240, U. S. Department of Agriculture, 1905; Progress in Legume Inocula- 

 tion. Farmers' Bulletin 315, 1008. 



KEPHART, HORACE: The Book of Camping and Woodcraft. A Guidebook for those 

 who Travel in the Wilderness. New York, The Outing Publishing Company, 

 1909, pages 217-255. 



LAWES, JOHN B. and GILBERT, J. HENRY: The Battle in the Meadow. Gardeners' 

 Chronicle, new ser., xii, 390, Sept. 27, 1879. 



LIPMAN, JACOB G.: Bacteria in Relation to Country Life. New York, The MacMillan 

 Company, 1908. 



MACMILLAN, H. F. : A Handbook of Tropical Gardening and Planting. Second 

 edition, H. W. Cave & Co., Colombo, 1914. 



MAISCH, JOHN M. : A Manual of Organic Materia Medica. Third edition, Philadelphia, 

 Lea Brothers & Co., 1887, 209-252. 



MOORE, GEORGE T.: Soil Inoculation for Legumes. Bulletin 71, Bureau of Plant 

 Industry, U. S. Department of Agriculture, 1905. 



MOORE, GEORGE T. arid ROBINSON, T. R. : Beneficial Bacteria for Leguminous Crops. 

 Farmers' Bulletin 214, U. S. Department of Agriculture, 1905. 



PIPER, C. V.: Leguminous Crops for Green Manuring. . Farmers' Bulletin 278, 1907. 



ROBBINS, WILFRED W.: The Botany of Crop Plants. Philadelphia, P. Blakiston's 

 Son & Co., 1917. 



SAUNDERS, CHARLES F.: Useful Wild Plants of the United States and Canada. 

 New York, Robert M. McBride & Co. ; 1920. 



SMITH, ERWIN F.: Bacteria in Relation to Plant Diseases. Volume 2, 1911, 97-146. 



SPRATT, ETHEL R. : A Comparative Account of the Root-nodules of the Leguminosae. 

 Annals of Botany, cxxx, 189-199, April, 1919. 



WILEY, H. W.: The Sugar Beet. Farmers' Bulletin 52, 1897. 



WILSON, E. H.: A Naturalist in Western China with Vasculum, Camera and Gun. 

 New York, Doubleday, Page & Co., n, 48-63, 1913. 



WINSLOW, CHARLES EDWARD AMORY: Protection of River and Harbor Waters from 

 Municipal Wastes. Guide Leaflet 33, American Museum of Natural History, 

 April, 1911. 



