Some years ago when I became engaged in the study of focal infections, interest centered largely round joint and various rheumatic lesions, and the tonsil was receiving first consideration as the probable responsible focus and portal of entry. It early became clear that in order to justify many of the charges made against the tonsil, and to solve even some of the numerous problems arising in connection therewith, we were in great need of intensive studies on certain phases of the bacteriology and pathology of these organs. Even more, perhaps, than studies designed to relate infectious lesions in various localities to the tonsil as a focus, we needed fundamental studies on the bacteriology and pathology of these organs in normal persons. I wish here to present briefly certain studies along these lines.
DISTRIBUTION OF LYMPHOID TISSUE
An interesting point appears in connection with the distribution of lymphoid tissue in the