428 SUCCESSFUL FARMING 



Where successful production of medicinal plants has not been demon- 

 strated it should be determined on small experimental plats before under- 

 taking commercial plantings. 



REFERENCES 



Michigan Expt. Station Bulletin (Special) 72. "Some Gingseng Troubles." 



U. S. Dept. of Agriculture Bulletin 26. "American Medicinal Flowers, Fruits and 



Seeds." 

 Farmers' Bulletins, U. S. Dept. of Agriculture: 



531. "Larkspur or Poison Weed." 



551. "Cultivation of American Ginseng." 



613. "Goldenseal Under Cultivation." 



694. "The Cultivation of Peppermint and Spearmint." 



663. "Drug Plants Under Cultivation." 



