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December 26, 1936


JAMA. 1936;107(26):2150. doi:10.1001/jama.1936.02770520052022

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To the Editor:—  My attention has been called independently by Dr. Walter R. Johnson of Asheville, N. C., and Dr. Hans Wassing of Paterson, N. J., to an error in my article on "Painless Jaundice," which appeared in The Journal, May 11, 1935, p. 1681. In that article I stated that "the determination of galactose in the urine is done exactly like the quantitative determination for dextrose; the only modification is that, because of the greater reducing power of galactose, it is necessary to multiply the result by 0.7."Dr. Wassing calls my attention to wide discrepancies in practice in different laboratories and in different textbooks. Thus, he says that Gradwohl in his textbook states that 25 cc. of Benedict's reagent is reduced by 54 mg. of galactose. Therefore, one would use a correction of 1.1. Wassing himself found approximately the same, 55 or 56 mg. of galactose reducing 25

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