In a communication on this subject, by Anne V. C. Lloyd, MB, Gilbert Grimes, MD, Kon*-Taik Khaw, MD, and Harry Shwachman, MD, Boston, published in the June 29 issue, three errors been noted. (1) On page 1003, the first word in line five of the paragraph "Laboratory Methods" was misspelled and should read "cresyl." (2) In the paragraph above "Comment" on the same page, "Staphylococcus" should appear in the first line before "aureur." (3) On page 1005, in the 11th line above "Summary," the first word "chloramphenicol" was misspelled.