 Esmarch himself invented an apparatus, which bears his name, for keeping a limb nearly bloodless during amputation.No part of Esmarch's work is more widely known than that which deals with First Aid, his "First Aid on the Battlefield" and "First Aid to the Injured" being popular manuals on the subject.The latter is the substance of a course of lectures delivered by him in 1881 to a Samaritan School, the first of the kind in Germany, founded by Esmarch in 1881, in imitation of the St John Ambulance classes which had been organized in England in 1878.