Since the wide-range orally administered antibiotics, aureomycin (Finland and others, 1948) and terramycin (Willcox, 1951; Willcox and Findlay, 1952), were first reported as effective in nongonococcal urethritis the question has arisen of their relative efficacy. In a previous paper a comparison was made of the relative efficacy of terramycin, aureomycin, chloramphenicol, sulphonamides, strepto...