BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



The work of the Bureau of Plant Industry, which was organized July 1, 1901, is 

 classified under the general subjects of Pathological Investigations, Physiological 

 Investigations, Taxonoinic Investigations, Agronomic Investigations, Horticultural 

 Investigations, and Seed and Plant Introduction Investigations. All_ the scientific 

 and technical publications of the Bureau are issued in a single series of Bulletins. 



Attention is directed to the fact that the publications in this series are not for gen- 

 eraldistribution. The Superintendent of Documents, Government Printing Office, 

 AVashington, D. C, is authorized l>y law to sell them at cost, and to him all applica- 

 tions for these bulletins should be iuade, accom})anied by a postal money order for 

 the required amount or by cash. Postage stamps and personal checks will not be 

 accepted in payment for publications. 

 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 Pepi)ers. 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 Decav of Timber and :\Iethods of Preventing It. 1902. Price, 55 cents. 



15. Forage Conditions on the Border of the Great Basin. 1902. Price, 1 5 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 tlie :\[usaic Disease of Tobacco. 1902. Price, 15 cents. 



19. Kentuckv Bluegrass «eed. 1902. Price, 10 cents. 



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



21. List of American A'arieties 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. Saragolla 



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

 sional Seed and Plant Distribution Circulars. 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 cents 



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 cents. 



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



40. Cold Storage, with Reference to the Pear and Peach. 1903. Price, 15 cents. 



41. The Commercial Grading of Corn. 1903. Price, 10 cents. 



42. Three New Plant Introductions from Japan. 1903. Price, 10 cents. 



[Contiuued on page 3 ol covetj 

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