Sir,?More than fifty cases treated by this method have more than proved its value. This treatment was introduced by Muldavin and Holtzmann (Lancet, 1938, i, p. 549) who cleaned up the wound with a saturated solution of urea, and after removing moisture and necrotic material applied pure urea to the wound itself and zinc cream to the adjacent skin. The wound was then covered with waxed paper and...