In Illinois and several sections of the country a vigorous crusade is being iuaugurated against tuberculous cattle as a source of possible infection. Herds are being examined and decimated and the prospects seem good for the extinction of bovine tuberculosis in the near future. One question suggests itself at once, however, that is apparently not noticed by the press reporters of these transactions; that is, what is done about the infected quarters, the sheds, milking yards, stables, etc., that have been occupied by the diseased cattle? These certainly are liable to have become infected, and it is poor policy to expose healthy animals to the danger of becoming diseased by leaving them undisinfected. Something might, perhaps, also be said as regards infection of dairies, and also of pastures, but this latter may be carrying the matter too far, as fresh air and sunlight will probably serve as efficient disinfectants there.