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 and 

 Experiments, Grass and Forage Plant Investigations, Pomological Investigations, and 

 Gardens and Grounds, all of which were formerly separate divisions, and also Seed 

 Introduction and Distribution, the Arlington Experimental Farm, Tea Investigations 

 and Experiments, and the Congressional Seed Distribution. Beginning with the date 

 of organization of the Bureau, the independent series of bulletins of the section of 

 Seed and Plant Introduction, the last number of which was 22, and of each of the other 

 divisions were discontinued, and all are now published as one series of the Bureau. 



The bulletins published in this series are: 



No. 1. The Relation of Lime and Magnesia to Plant Growth. 1901. 



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. North American Species of Spartina. 1902. 



10. Records of Seed Distribution and Cooperative Experiments with Grasses 



and Forage Plants. 1902. 



11. Johnson Grass: Reports 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 the 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 Agaricus cam- 



pestris and Other Basidiomycetous Fungi. 1902. 



17. Some Diseases of the Cowpea. 1902. 



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



19. Kentucky Blue Grass Seed: Harvesting, Curing, and Cleaning. 1902. 



20. Manufacture of Semolina and Macaroni. 1902. 



21. List of American Varieties of Vegetables. 1902. 



22. Injurious Effects of Premature Pollination, etc. 1902. • 



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



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



25. Miscellaneous papers. 1902. 



