Shortly after the publication of my paper concerning Landau's color test for the serodiagnosis of syphilis1 I learned that 0.1 c.c. instead of 0.01 c.c. of the 1 per cent. iodin in carbon tetrachlorid reagent should have been used with 0.2 c.c. of serum. The Journal,2 from which I obtained this technic, had quoted from an Italian medical journal3 which was responsible for the error. Additional foreign literature4 states that the correct quantity of the iodin reagent is 0.1 c.c. and since my work had been done with 0.01 c.c. reagent or ten times less the amount given by Landau I have continued the work with this correction, the results being summarized in this paper.
A 1 per cent, solution of iodin was prepared according to weight by dissolving 1 gram of iodin crystals in 62.7 c.c. pure carbon tetrachlorid (specific gravity 1.59 at laboratory temperature)
KOLMER JA. A FURTHER NOTE ON LANDAU'S COLOR TEST FOR SERODIAGNOSIS OF SYPHILIS. JAMA. 1915;LXIV(24):1966–1968. doi:10.1001/jama.1915.02570500014004
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