The flexibility of hospitals is a matter of importance. The Public Health Service has divided its hospitals into three general groups, that is, hospitals for general medicine and surgery, for pulmonary tuberculosis and for neuro-psychiatry. We have striven, however, even in these broad groups to make such hospitals available, at least temporarily, for any class of case which seeks admission. This has been especially true with regard to pulmonary tuberculosis and we have been rather insistent that every general hospital should set aside a certain number of its beds for the care of such cases. A similar policy has been followed with regard to neuro-psychiatric disorders. Even if the general hospital can be made no more than a distributing point for these special classes of cases it is, nevertheless, wise that such provision should be made. Consideration has been given to the possibility of adopting a method which was followed by the Army during the war, that is; specializing in hospitals to much greater degree and organizing certain hospitals on such a basis that they might be especially prepared, both in personnel and equipment, to care for one or two classes of disorders. The patients with which we have to deal, however, are by no means so easily transported and so easily congregated in special groups. This method, therefore, while it deserves much consideration, has not been found feasible in our work. Consideration has also been given to the establishment of convalescent hospitals, and while such institutions have much to commend them, they also possess some very serious disadvantages, especially with the class of patients with which we are now dealing. We have opened one such hospital which is still in operation and is giving satisfactory service. It has been a general policy of the Public Health Service, of course, to seek in every way to establish in all of its hospitals standards of professional service in full accord with the best modern practice. At the same time we have sought to avoid the fostering of radical methods which might verge on the field of fads. We have preferred to adopt a somewhat conservative attitude in this regard and have been unwilling to make use of methods until they had been fairly well tried out and established as useful. It has also been a policy, as far as possible, to establish a uniformity in professional service, at the same time doing nothing which might interfere with individual initiative. General Uniformity in professional service is desirable not only for administrative reasons, but for professional ones as well. It goes without saying that we have felt the absolute necessity of establishing a professional service which would be reasonable in cost. The expenditure of money in professional service is, of course, wise. At the same time it has seemed to us that any professional service which could not be justified on the basis of economy was probably more than necessary.