As we go to press the St. Louis session promises to be one of the most successful in the history of the Association. The weather is magnificent and augurs well, not only for a highly satisfactory Session, but also for the success of the outdoor entertainments planned. The first meeting of the House of Delegates was held Monday under the presidency of Col. Gorgas, and the usual routine business was transacted; the account of the proceedings appears on page 1963. A cordial reception was given to the visiting physicians. The registration on Monday was 1,400 and that number was greatly exceeded on Tuesday.