Innumerable papers and discussions on pneumonia in infancy and childhood have been published within recent years. Most of these are based on insufficient data, as the number of cases subjected to a critical analysis are not many, and the recorded observations as to management and diagnosis do not emanate from one source. Hospital statistics, as a rule, are collated from the services of a number of attending physicians. The histories and diagnoses must, in such cases, vary widely as to points of view, and thus will militate against the reliability of the ultimate conclusions.
Many authors err primarily by assuming that the anatomic nature of pneumonia, whether bronchopneumonia or lobar pneumonia, can be determined definitely at the bedside. This is at times almost possible, and though the age limitations of bronchopneumonia as compared with lobar pneumonia are well recognized, this is not so important to the practitioner as are other