BUXLETINS 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 and Plant Introduction, The Arlington Experimental Farm, Tea Investigations 

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

 date of organization of the Bureau, the independent series of bulletins of the Division 

 of Vegetable Pathology and Physiology, the last number of which was 29. and of 

 each of the other Divisions were discontinued, and all are now published as one series 

 of the Bureau. 



The bulletins published in the series are: 



No. 1. The gelation 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 Introduc- 



tion. Inventory N :>. \ 3. 4351-5500. t9G2. 



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



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



\ 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. i902. 



15. Forage Conditions on the Northern Border of the Great Basin. lv<02. 



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



pestris and other Basidioinycetous Fungi. 1902. 



17. Some Diseases of the Cowpea. 1902. 



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



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



20. Manufacture of Semolina and Macaroni. 1902. 



21. List of American Varieties of Pepper. 1902. 



22. Injurious effects of Premature Pollen, etc. 1902. 



