The Materia Medica of some important nosodes, sarcodes, bowel nosodes and provings of penicillin, chloromycetin and others. In this age of antibiotics, it is becoming more and more apparent that however useful they may appear to be, they are very often attended with undesirable side-effects and render the patients allergic to their future use. Hence there is an attempt on the part of Homeopaths to prove these drugs, on strictly Hahnemannian lines, to ascertain their individualising features for therapeutic purpose and to render them suitable for administration in potentised form to antidote the ill effects of the respective antibiotic drugs in crude doses.