In Dr. J. G. M. Bullowa's discussion in the special article entitled "Postgraduate Institute on Pneumonia" in The Journal, Dec. 18, 1937, page 2058, about the middle of the second column, the sentence beginning "If a much more rapid flow, 80 liters a minute," should have read "8 liters per minute." Farther on in the same column the expression "alveolar air of a tent" should have read "alveolar air in a tent." Six lines from the end of this discussion the phrase "the hazard of fire from explosion" should be "hazard of fire from rapid combustion simulating explosion." On page 2062, first column, third paragraph, "Hooper" should be "Cooper." In the second column, fifth paragraph, on this page, add "with pneumococcus type II pneumonias" after the words "fifty-four patients." In the fourth line from the end of the seventh paragraph, "5 cc." should have been "0.5 cc." On page 2063,