BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



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

 table Pathological and Physiological Investigations, Botanical Investigations, Farm 

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

 gations, and Experimental Gardens and Grounds, all of which were formerly separate 

 Divisions; and also Seed and Plant Introduction and Distribution; the Arlington 

 Experimental Farm; Investigations in the Agricultural Economy of Tropical and 

 Subtropical Plants; Drug artd Poisonous Plant Investigations; Tea Culture Investiga- 

 tions; 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 published 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 Agriculfure 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 Office, Washington, D. C. 



No. 1. Thti 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, 1(T 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, etc. 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 Deoay 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 Campei 



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



17. Some Disea.ses of the Oovvpea. 1902. Price, 10 cents. 



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



19. Kentucky Bluegra.ss Seed. 1902. Price, 10 cents. 



20. Manufacture of Semolina and Macaroni. 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. 11. 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, Spain, 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. Pfice, 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"of the Western Yellow Pine, etc. 1903. Price, 30 cents. 



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



Phycomyces Niteng. 1903. Price, 15 cents. 



[Continued on page 3 of cover.J 



