After the termination of the late war of the rebellion, the United States Sanitary Commission resolved to publish a series of volumes, with a view to the diffusion and permanent availability of important information, acquired during the war, relating to the grand object of the labors of the Commission, namely, to lessen the evils of warfare as far as possible by the systematic and efficient employment of sanitary measures. Much valuable material for the proposed volumes had already accumulated in the Historical Bureau, consisting of reports and various documents received from appointed inspectors and agents, as also from medical officers and others interested in the labors of the Commission. To this material has been added much obtained by means of a printed circular, inviting contributions from all who had had "opportunities for special studies in hospitals or in the field," or who had "made professional observations upon any subject connected with military Hygiene, Camp Diseases, and Surgery." In addition, elaborate papers have been furnished, upon personal application, by members of the medical profession, distinguished for researches or large experience in the departments of inquiry to which their papers relate. These measures and all arrangements connected with the preparation of the volumes, have been under the immediate direction of the Medical Committee of the Commission, the committee consisting of Professor Win. H. Van Buren, M. D., Cornelius R. Agnew, M. D., Elisha Harris, M. D., Professor Wolcott Gibbs, M. D., and Professor J. S. Newberry, M. D. - the last-named member of the Commission having been recently added to the Committee.