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JAMA. 1937;108(5):396-397. doi:10.1001/jama.1937.02780050052018.
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THE VITAMIN C CONTENT OF ORANGE JUICE  In newspapers and magazines, on car cards and billboards the public is being told by the California Fruit Growers Exchange that Sunkist navel oranges are "22 per cent richer in vitamin C." What evidence exists for this statement and what significance should be attached to it? Last September, among other papers presented at the meeting of the American Chemical Society in Pittsburgh, was a report by A. J. Lorenz of the California Fruit Growers Exchange. His paper bore the imposing title "Statistical Review of 1,100 Sugar-Ratio Determinations Correlated with Vitamin C Values Representing 14,000 Oranges under Varying Conditions." The juice of California oranges was reported to contain an average of 0.60 mg. of cevitamic acid per cubic centimeter, whereas the juice of Florida oranges contained 0.53 mg. when tested by the same chemical method. The difference is only 13 per cent, so perhaps


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