BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



The Bureau of Plant. Industry, which was organi/ed July 1, 1901, includes Vege- 

 table Pathological* and Physiological Investigations, Botanical Investigations and 

 Experiments, Grass and Forage Plant Investigations, Pomological Investigations, 

 and Gardens- and Grounds, all of which were formerly separate Divisions, and also 

 Seed and Plant Introduction and Distribution, The Arlington Experimental Farm, 

 and Tea Investigations and Experiments. 



Beginning with the date of organization of the Bureau, the independent series of 

 bulletins of the several Divisions were discontinued, and all are now published as 

 one series of the Bureau. 



The bulletins issued in the present series are: 



No. 1. The Relation of Lime and Magnesia to Plant ( Growth. 1.901. 



2. Spermatogenesis and Fecundation of Zamia." 1901. 



3. Macaroni Wheats. 1901. 



4. Range Improvement in Arizona. 1901. 



5. Seeds and Plants Imported through the Section of Seed and Plant Intro- 



duction. Inventory No. 9, Nos. 4351-5500. 1902. 



6. A List of American Varieties of Peppers. 1902. 



7. The Algerian Durum Wheats: A Classified List, with Descriptions. 1902. 



8. A Collection of Economic and Other Fungi Prepared for Distribution. 1902. 



9. The North American Species of Spartina. 1902. 



10. Records of Seed Distribution and Cooperative Experiments with Grasses 



and Forage Plants. 1902. 



11. Johnson Grass: Report of Investigations Made During the Season of 



1901. 1902. 



12. Stock Ranges of Northwestern California. 1902. 



13. Experiments in. Range Improvement in Central Texas. 1902. 



14. The Decay of Timber and Methods of Preventing It. 1902. 



15. Forage Conditions on the Northern Border of the Great Basin. 1902. 



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



tris and Other Basidiomycetous Fungi. 1902. 



17. Some Diseases of the Co wpea. 1902. 



18. Observations on the Mosaic Disease of Tobacco. 1902. 



19. Kentucky Bluegrass Seed: Harvesting, Curing, and Cleaning. 1902. 



20. Manufacture of Semolina and Macaroni. 1902. , 



21. List of American Varieties of Vegetables. 1903. 



22. Injurious Effects of Premature Pollination. 1902. 



23. Berseem: The Great Forage and Soiling Crop of the Nile Valley. 1902. 



24. The Manufacture and Preservation of Unferrnented Grape Must. 1902. 



25. Miscellaneous Papers. 1902. 



26. Spanish Almonds and Their Introduction into America. 1902. 



27. Letters on Agriculture in the West Indies, Spain, and the Orient. 1902. 



28. The Mango in Porto Rico. 1902. 



29. The Effect of Black Rot on Turnips. 1903. 



30. Budding the Pecan. 1902. 



31. Cultivated Forage Crops of the Northwestern States. 1902. 



32. A Disease of the White Ash Caused by Polyporus Fraxinophilus. 1903. 



33. North American Species of Leptochloa. 1903. 



34. Silkworm Food Plants. 1903. 



35. Recent Foreign Explorations, as Bearing on the Agricultural Development 



of the Southern States. 1903. 



