? series of the Bureau. A list of the bulletins issued in the present series follows. 
‘BULLETINS OF THE BUREAU OF PLANT INDUSTRY. | 
‘The Bureau of Plant Industry, which was organized July 1, 1901, hue 
_ table Pathological and Physiological TENS _ Botanical Investigations ai 
sions, and also Seed and Plant Introduction and Distribution, the Arlington BD per- 
imental Farm, Tea-Culture Investigations, and Domestic Sugar Investigations. ~ HS 
Beginning with the date of organization of the Bureau, the several series of bull. 
_ tins of the various Divisions were discontinued, and all are now- Saisie as one 
Attention is directed to the fact that ‘‘the serial, scientific, and technical publica- 
kc | a re _ tions of the United States Department of Agriculture are not for general abe 
— eents. 
_ 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 
tenia should, therefore, ‘be made to the Superintendent of Documents, Union 
- Building, Washington, D. C. se 3 
No. 1. The Relation of Lime and Magnesia to Plant Growth. I. Tiviase of Say 
from a Physiological Standpoint. — II. Experimental Study of the Relation, of Li 
and Magnesia to Plant Growth. 1901. Price, 10 cents. ~ 2 ae 
No. 2. Spermatogenesis and Fecundation of Zamia. 1901. Price, 20 cents. \— a 
No. 3. Macaroni Wheats. 1901.- Price, 20.cents. ~ es 
No, 4. Range Improvement in Aieaes (Cooperative Experiments with the Ari 
zona Experiment Station.) 1902. Price, 10 cents. - <2 
No. 5. Seeds and Plants Imported Through the Section of Seed and Plant a 
duction for Distribution in Cooperation with the Agricultural Pe ‘Stations. 
Inventory No. 9, Numbers 4851-5500. — 1902. Price, 10 cents. 
No. 6. A List of American Varieties cf Peppers. 1902. Price. 10 cents: oe ae 
No. 7. The Algerian Durum Wheats: A Classified: List, with Descriptions. 1902. 
Price, 15 cents. RD 
No. 8. A Collection of Economic and Other Fungi SS for Distribution. 19 
Price, 10 cents. ae 
No. 9. The North American Species of Spartina. 1902. Price, 10 cents. 
No. 10. Records of Seed- Distribution and Cooperative Experiments with Grasses: 
and Forage Plants. 1902. Price, 10 cents. er 
No: 11; ~ Johnson Grass: Report of Investigations Made During the Season of 190 
1902. Price, 10 cents. we 
No. 12. Stock Ranges of Northwestern California. Notes on the Grasses and Forage 
oe and Range Conditions. 1902. Price, 15 cents. Fe - 
190 ts 
is 
53 oo" 
No. 13. Experiments in Range Improv ements in Central Texas. 
Gene 
No. 14. The Decay of Timber and Methods of Preventing It. 1902. _ Pie se, 
No. 15. Forage Conditions on the Northern Border of the Great Bas sin, pe 
Report upon Investigations Made During July and August, 1901, in the =“ 
- Between Winnemucca, Nevada, and Ontario, Oregon. 1902. ‘Price, 15 cents. — 
~ No. 16. A Preliminary Study. of the Germination of the Spores of Agaricus C 
pestris and Other Basidiomycetous Fungi. 1902... Price, 10 cents. 
No. 17. Some Diseases of the Cowpea: I. The Wilt Disease of the Compes ane 
~ Control. II. A Cowpea Resistant to Root Knot (Heterodera- Radicicola).’ 
Price, 10 cents. 
No. 18. Observations on the Mosaic Disease of Tobacco. 1902. — Price, 15 cet 
No. 19, Kentucky Bluegrass Seed: Harvesting, Curing, and Cleaning. 1902. 
10 cents. st 
No. 20. Manufacture of Semolina and Macaroni. 1902. Price, 15 cents. 
_ No. 21. List of American Varieties of Vegetables for the Years 1901- 
a _ Price, 35 cents. 3 
[Continued on p. 3 of cover.] 
