During the past few years an awakened interest has been noted in direct intrapulmonary therapy by means of cannulated instruments, particularly the various types of nonmetallic bronchial catheters. Ten years ago I devised a styletted, soft rubber catheter, 1 made by the George P. Pilling & Son Company of Philadelphia, which I have been using since that time. This was originally intended for use in making endobronchial instillations of iodized poppy seed oil 40 per cent for bronchographic purposes. Others had devised similar instruments before I called attention to their use, and have done so since. The bronchial catheter was first suggested to Horace Green 2 of New York by Marshall Hall of London in 1855. Darter, 3 in 1893, was the first to utilize a styletted catheter for this purpose, so far as a careful search of the literature reveals. Following my use of the instrument, Stitt, 4