The American Clinical and Climatological Association was organized in 1884 by a group of physicians and scientists who set about to improve medical education, research and practice in this country. Its initial concern was with tuberculosis and its treatment by residence in a suitable climate. Throughout its long history, the Association has expanded its interests to all scientific and clinical aspects of medicine and its specialties as well as epidemiology, preventive and environmental medicine, while retaining a continuing interest in the influence of global climate changes on health and disease. Its membership comprises outstanding physicians selected on the basis of their leadership, their excellence in their chosen field, their demonstrated high level of integrity and professionalism, and their yearning to nurture a spirit of warmth, diversity and friendship. The annual meeting of the Association provides an opportunity for presentation and critical discussion of the most recent progress in research, practice and teaching. It is devoted to the scientific understanding and to the compassionate care of human disease. The meeting also serves to reaffirm the values and the principles of the Association. Active membership is limited to 250 physicians.