R. L. KAHN, Sc.D.
JAMA. 1929;93(5):351-353. doi:10.1001/jama.1929.02710050005002.
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What is the status of laboratory tests for syphilis today? To find the answer to this question, the League of Nations Health Committee arranged a competitive conference last summer at the State Serum Institute in Copenhagen (May 21-June 4, 1928). The official report of this conference has just appeared,1 making possible the presentation of a summary of the findings.

The general plan of the health committee was to have authors of different Wassermann and precipitation tests examine serums by means of their respective methods. Specimens of blood were collected by clinicians in medical centers such as London, Paris and Berlin and sent by air mail to Copenhagen. The serums were then separated from the blood clots, divided into fifteen different portions and distributed to each worker or group of workers participating in the competition. After testing the specimens, the workers submitted records of their results in sealed envelopes to


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