The enormous amount of work done in bacteriologic lines as to tuberculin has been of such little avail as to treatment and prevention, that I have no hesitation in bringing before the Section in a few words, a record of work that has been done on other lines and to the glory of medicine in that this work has cured the desperately sick and prevented the pre-tubercular becoming tubercular. Dr. John Christian read a Latin inaugural thesis at Jena, October, 1729, in which reference is made to the coagulation of living blood by vinegar which he says dissolves silica and poisons like viper's venom. He laid down the law,"Causa coagulationis sanguinis est acidum." In "The Relation of Alimentation and Disease," Dr. James H. Salisbury recounts his investigations made on 1,028 hogs fed with sour foods in 1858. Salisbury in the preface, page iii, says: "I had been a graduate