Phenol acid. After setting the bone and supporting the leg with splints, Lister soaked clean cotton towels in undiluted carbolic acid and applied them to the wound, covered with a layer of tin foil, leaving them for four days. When he checked the wound, Lister was pleasantly surprised to find no signs of infection, just redness near the edges of the wound from mild burning by the carbolic acid. Reapplying fresh bandages with diluted carbolic acid, the boy was able to walk home after about six weeks of treatment. By 16 March 1867, when the first results of Lister's work were
Letter case Letter case Letter case (or just case) is the distinction between the letters that are in larger upper case (also "uppercase", "capital letters", "capitals", "caps", "large letters", or more formally "majuscule") and smaller lower case (also "lowercase", "small letters", or more formally "minuscule") in the written representation of certain languages. The writing systems that distinguish between the upper and lower case have two parallel sets of letters, with each letter in one set usually having an equivalent in the other set. The two case variants are alternative representations of the same letter: they have the same name and pronunciation and