The first edition of the monograph on tuberculosis in childhood appeared in 1909. This edition is subdivided into a theoretical and a practical part. The theoretical phase of tuberculosis is based largely on the senior author's laboratory observations on lower animals, and the practical part is devoted to the clinical phases of tuberculosis in childhood.
As in any other branch of medicine, views and hypotheses in regard to tuberculosis are constantly undergoing considerable metamorphosis, so that what appeared to be valid in 1909 may be entirely invalidated by 1932. The views expressed in this volume in regard to the theoretical phases of tuberculosis differ but little from those uttered by the senior author in 1911, and, as stated, are based largely on his own experimentations on animals between 1909 and 1911. Thus the all important question as to the relation of allergy to immunity, which prompted considerable discussion and experimentation