In the article entitled "The Comparative Value of Toxoid and of Other Agents in the Immunization of the Preschool Child Against Diphtheria," by A. B. Schwartz, M.D., and F. R. Janney, M.D., Milwaukee (Am. J. Dis Child. 39:504 [March] 1930), reference was made on page 507 to Schick tests "done with material prepared by the New York State Board of Health Laboratories." This should have read "the Laboratories of the New York Department of Health."