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1 Tobacco Research Laboratory, Bowman Gray School of Medicine, Wake Forest College, Winston-Salem, N. C.
Nicotine levels in the blood of smokers have been determined by a chemical method. Subjects who inhale deeply tend to show higher concentrations than do slight inhalers. Nicotine isolated from smokers' blood gave the expected effect on the blood pressure of a cat.
Submitted on October 18, 1948