On page 227, Vol. XXV, No. 2, February 1, 1917, line 20, for 2 or 3 minutes read 20 to 30 minutes.
On page 228, lines 28, 29, and 30 should read: It should also be mentioned, as has been shown by the experiments of Bordet and Zunz with guinea pigs, that it is better to employ homologous serum; that is, rabbit serum.
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Copyright, 1917, by The Rockefeller Institute for Medical Research New York
1917
