Chinese Colza—an adulterant of mustard seed**Revised reprint from the Oil, Paint and Drug Reporter. A monograph on the subject entitled, “Studies in Mustard Seeds and Substitutes: I. Chinese Colza (Brassua cumpesfris chinoleifera Viehoever),” by Arno Viehoever, Joseph F. Clevenger, and Clare Olin Ewing, has been published in the Journal of Agricultural Research,Vol. XX, No. 2, October 15,1920, pages 117-39.