BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



The Bureau of Plant Industry, which was organized Julj' 1, 1901, includes Vege- 

 table Pathological and Physiological Investigations, Botanical Investigations, Farm 

 Management (including Grass and Forage Plant Investigations), Pomological Inves- 

 igations, and Experimental Gardens and Grounds, all of which were formerly con- 

 ducted as separate divisions; and also Seed and Plant Introduction and Distribution; 

 the Arlington Experimental Farm; Investigations in the Agricultural Economy of 

 Tropical and Subtropical Plants; X)rug and Poisonous Plant Investigations; Tea Cul- 

 ture Investigations; the Seed Laboratory, and Dry Land Agriculture and Western 

 Agricultural Extension. 



Beginning with the date of organization of the Bureau, the several series of Bulle- 

 tins of the various Divisions were discontinued, and all are now jiublished as one 

 series of the Bureau. A list of the Bulletins issued in the present series follows. 



Attention is directed to the fact that ' ' the serial, scientific, and technical publica- 

 tions of the United States Department of Agriculture are not for general distribution. 

 All copies not required for official use are by law turned over to the Superintendent 

 of Documents, who is empowered to sell them at cost." All applications for such 

 publications should, therefore, be made to the Superintendent of Documents, Gov- 

 ernment Printing Olfice, Washington, D. C. 



No. 1. The Relation of Lime and Magnesia to Plant Growth. 1901. Price, 10 cents. 



2. Spermatogenesis and Fecundation of Zamia. 1901. Price, 20 cents. 



3. Macaroni Wheats. 1901. Price, 20 cents. 



4. Range Improvement in Arizona. 1902. Price, 10 cents. 



5. Seeds and Plants Imported. Inventory No. 9. 1902. Price, 10 cents. 



6. A List of American Varieties of Peppers. 1902. Price, 10 cents. 



7. The Algerian Durum Wheats. 1902. Price, 15 cents. 



8. A Collection of Fungi Prepared for Distribution. 1902. Price, 10 cents. 



9. The North American Species of Spartina. 1902. Price, 10 cents. 



10. Records of Seed Distribution and Cooperative Experiments with Grasses and 



Forage Plants. 1902. Price, 10 cents. 



11. Johnson Grass. 1902. Price, 10 cents. •• 



12. Stock Ranges of Northwestern California. 1902. Price, 15 cents. 



13. Range Improvement in Central Texas. 1902. Price, 10 cents. 



14. The Decay of Timber and Methods of Preventing It. 1902. Price, 55 cents. 



15. Forage Conditions on the Border of the Great Basin. 1902. Price, 15 cents. 



16. A Preliminary Study of the Germination of the Spores of Agaricus Campes- 



tris and Other Basidiomycetous Fungi. 1902. Price, .10 cents. 



17. Some Diseases of the Cowpea. 1902. Price, 10 cents. ^ ^ 



18. Observations on the Mosaic Disease of Tobacco. 1902. ' Price, 15 cents. 



19. Kentucky Bluegrass Seed. 1902. Price, 10 cents. 



20. Manufacture of Semolina and INIacaroni. 1902. Price, 15 cents. 



21. List of American Varieties of Vegetables. 1903. Price, 35 cents. 



22. Injurious Effects of Premature Pollination. 1902. Price, 10 cents. 



23. Berseem. 1902. Price, 15 cents. 



24. Unfermented Grape Must. 1902. Price, 10 cents. 



25. Miscellaneous Papers: I. The Seeds of Rescue Grass and Chess. II. SaragoUa 



Wheat. III. Plant Introduction Notes from South Africa. IV. Congres- 

 sional Seed and Plant Distribution Q'irculars. 1903. Price, 15 cents. 



26. Spanish Almonds. 1902. Price, 15 cents. 



27. Letters on Agriculture in the West Indies, etc. 1902. Price, 15 cents. 



28. The Mango in Porto Rico. 1903. Price, 15 cents. 



29. The Effect of Black Rot on Turnips. 1903. Price, 15 cents. 



30. Budding the Pecan. 1902. Price, 10 cents. 



31. Cultivated Forage Crops of the Northwestern States. 1902. Price, 10 ceuls. 



32. A Disease of the White Ash. 1903. Price, 10 cents. 



33. North American Species of Leptochloa. 1903. Price, 15 cents. 



34. Silkworm Food Plants. 1903. Price, 15 cents. 



35. Recent Foreign Explorations. 1903. Price, 15 cents. 



36. The "Bluing" and the "Red Rot" of the Pine. 1903. Price, 30 cents. 



37. Formation of the Spores in the Sporangia of Rhizopus Nigricans and of Phy- 



comyces Nitens. 1903. Price, 15 cents. 

 ,38. Forage Conditions in Eastern Washington, etc. 1903. Price, 15 eents. 

 39. The Propagation of the Ea.ster Lily from Seed. 1903. Price, 10 cents. 



[Continued on page 3 of cover.] 



