HISTORY AND BIBLIOGRAPHY 855 



True, R. H. Cultivation of drug plants in the United States. 

 Yrbk. U. S. Dept. Agr. 1903: 337-346. 



Medicinal, condimental and aromatic plants. Cy. Am. Agr. 

 2:458-467. 



Progress in drug plant cultivation. Yrbk. U. S. Dept. Agr. 

 1905 : 532-540. (Domestication of wild drug plants, 534-535 ; 

 Utilization of weeds, 535-536.) 



Weschke, C. The enumeration of the medicinal plants of Minne- 

 sota. Phar. Rund. 8:155-157. 



Young, T. B. American Wormseed (Chenopodium anthelminti- 

 cum). Cy. Am. Agr. 2:466. 



WEED SEEDS. 



Ball, C. R. The purity and vitality of grass seed. Bull. la. Agr. 



Exp. Sta. 54:164-180. 

 Ball, 0. M. Alfalfa seed testing. Bull. Tex. Agr. Exp. Sta. 81 :15. 

 Beach, C. L. The viability of weed seeds in feeding stuffs. Bull. 



Vt. Agr. Exp. Sta. 138 :ll-20. 

 Beal, W. J. Seeds of Michigan Weeds. Bull. Mich. Agr. Exp. Sta. 



260 :101-182. 



Testing Seeds. Rept. Mich. Bd. Agr. 1877: 377-392. 

 Vitality and growth of seeds buried in the soil. Proc. Soc. 



Prom. Agr. Sci. 10:15-16. 



The vitality of seeds. Proc. Soc. Prom. Agr. Sci. 26 :89-93. 

 The vitality of seeds buried in the soil. Agr. Sci. 8 :284. 



Proc. Soc. Prom. Agr. Sci. 6:14-15; 15:283. Rept. Mich. Bd. 



Agr. 1884: 332-334. 



The vitality of seeds twenty years in the soil. Proc. Soc. 



Prom. Agr. Sci. 20:86-87. 

 Bessey, E. A. Seed analysis for 1911 and 1912. Bull. Mich. Agr. 



Exp. Sta. 270:71-98. 

 Boynton, M. F. Observations upon the dissemination of seed. Bot. 



Gaz. 20:502-503. 

 Brown, Edgar. Legal and customary weight per bushel of seeds. 



Bull. U. S. Dept. Agr. 51 :27-34. 

 Brown, E., & Hillman, F. H. Seeds of red clover and its im- 

 purities. Far. Bull. U. S. Dept. Agr. 169:24. 

 Burchard, O. Die Unkrautsamen der Klee-und Grassaaten mit 



besonderer Berucksiehtigung ihrer Herkunft. 100. 5 pi. Ber- 

 lin, 1900. 



