There are some diseases which predispose to consumption. They do this in two ways, by changing the contour of the body and by modifying the tissues of the body. To the former belong rickets, post nasal adenoid growths, rheumatism and gonorrhea. To the latter small pox, measles, whooping cough, typhoid fever, syphilis and pneumonia. Rickets may, for instance, produce chicken breast and thereby interfere with healthy breathing. Enlargement of the adenoid tissue also interferes with breathing. Rheumatism may do damage to the heart or to the pleura or the lining membranes of the joints and thereby pave the way for the tubercle bacillus. Much of the blame which is put upon small pox, measles and such acute diseases as a predisposing cause of tuberculosis is probably unwarranted, but it is possible that the damage which these diseases may do to the tissues may make soil for tuberculosis. A person who has gone through an acute disease while still weak offers good soil for implantation of the tubercle bacillus if he is exposed to contagion at that time, and in this sense, at least, all of the acute diseases predispose to tuberculosis.