INTRODUCTORY It has long been recognized that the leukocytes perform an important function in the struggle against bacterial invasion of the organism, and many important contributions have been made to this subject. But very few of these studies have been devoted to infants and young children.
INTRODUCTORY The pneumonias of infants have been particularly slighted, and that fact led to the undertaking of this work, more especially as our clinical experience has caused us to ponder as to the correctness of the assertion that lobar pneumonia was infrequent until after the second year. It is, however, true that most of the cases that come to necropsy under the second year are of the mixed type; these, however, are rarely primary or uncomplicated cases.
INTRODUCTORY To make this work of practical interest, cases of lobar and bronchopneumonia as well as complicated cases have been selected, fifty in all. It was hoped that some