BULLETINS OF THE BUREAU: OF PLANT INDUSTRY. es 
The Bureau of Plant Tndustey, which was Gremiee July 1, 1901, ineludes Vege- 
table Pathological and Physiological Investigations, Botanical Investigations and 
Experiments, Grass and Forage Plant Investigations, Pomological Investigations, and 
Experimental Gardens and Grounds, all of which were formerly separate divisions, 
and also Seed and Plant Introduction and Distribution, the Arlington Experimental 
Farm, Tea Culture Investigations, and Domestic Sugar Investigations. 
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 
-:eries 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 Agriculture 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 —— Union 
Building, Washington, D.C. : = 
No. 1. The Relation a Lime sad: Magnesia. to Plant Grow tL. Liming of Soils 
from a Physiological Stand point. Il. Experimental Study of the “Rela- 
tion of Lime and Magnesia to Plant Growth. ~1901. Price, 10 cents. — 
. Spermatogenesis and Fecundation of Zamia. 1901. Price, 20 cents. 
. Macaroni Wheats,—1901. Price, 20 cents. ~ 
. Range Improvement im Arizona. (Cooperative Experiments with the Ari 
zona Experiment Station.) 1902. Price, 10 cents. 
. Seeds and Plants Imported Through the Section of Seed and Plant Introdue- 
tion for Distribution in Cooperation with the Agricultural Experiment 
Stations. Inventory No. 9, Nos. 4851-5500. 1902. : 
6. A List of American Varieties ‘of Peppers. 1902. Price, 10 cents. | 
7. The Algerian Durum Wheats: A Classified List, with Descriptions. “1902. 
Price, 15 cents. _ hes 
8. A Collection of Economic and Other Fungi Prepared for Distribution. 1902. 
9 
0 
Or obo 
Price, 10:cents. 
. The North American. Species of Spartina. 1902. ~ Price, 10,cents: 
. Records of Seed Distribution and Cooperative Experiments with Grasses and 
Forage Plants. 1902. Price, 10 cents. 
11. Johnson Grass: Report of Investigations Made During the Season: of 1901. 
1902. Price, 10 cents. 
12. Stock Ranges of, Northwestern California: Notes on the Grasses and Forse 
Plants and Range Conditions. 1902. Price, 15 cents. — — ¥ 
13. Experiments in Range Improvements in Central Texas. 1902. Price, 10 
cents. 
14. The Decay of Timber, and Methods of Preventing It: 1902. Price, 55 cents. 
15. Forage Conditions- on the Northern Border of the Great Basin, Being a 
Report upon Investigations Made During July and August, 1901, in the 
_ Region Between Winnemucca, Ney., and Ontario, Oreg. 1902. Price, 15 
2. 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. I. The Wilt Disease of the Cowpea and Its 
Control. Il. A Cowpea Resistant to Root Knot ( Heterodera Radicicola ). 
Sasa 1902. Price, 10 cents. 
18. Observations on the Mosaic Disease of Tobacco. 1902. Price, 15 cents. 
19. Kentucky Bluegrass Seed: Harvesting, Curing, and Cleaning. 1902. - Price, 
10 cents. 
20. Manufacture of Semolina and Macaroni. 1902. Price, 15 cents. : 
21. List of American Varieties of Vegetables for the Years 1901 and 1902. 1£03. 
_ Price, 35 cents. 
wae Injurious Effects of Premature Pollination, with General Notes on Artificial 
Pollination and the Setting of Fruit Without Pollination. 1902: Price, 10 
cents. 
[Continued on p. 3 of cover. ] 
