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To the Editor:
—In The Journal, Dec. 31, 1927, p. 2277, you published a letter correcting an erroneous impression conveyed by an editorial in The Journal, Dec. 10, 1927, p. 2044, as to priority in respect to the composite nature of vitamin B.Your editorial, as well as the paper of Chick and Roscoe (Biochem. J.21:698, 1927) on which it was based, overlooked earlier work done at the Hygienic Laboratory by Smith and Hendrick (Pub. Health Rep.41:201-207 [Feb. 5] 1926), in which it was conclusively shown that dried brewers' yeast contains some growth-promoting factor essential in nutrition other than vitamin B, and that the unknown factor was thermostable.
McCoy GW. COMPOSITE NATURE OF VITAMIN B. JAMA. 1928;90(4):312. doi:10.1001/jama.1928.02690310064032