“…This is particularly disappointing when it is realized that most cases with large tension cavities were excluded from this series, for it was appreciated even during the period of peak enthusiasm, that in their treatment pneumothorax had little to offer. 4 Table I indicates that results are not inversely proportional to the haste with which pneumothorax is begun following diagnosis. The figures are not startlingly dissimilar when any period up to and even beyond two years after discovery of pulmonary tuberculosis is selected as the preferable time to commence pneumothorax treatment.…”