This second edition, as indicated by the title, is especially devoted to a discussion of the value of diathermy in pneumonia. The author's reports are most interesting and apparently fairly well controlled.
Pneumonia has been a fertile field for investigators interested in therapeutics. Various "cures" have appeared at frequent intervals. In reading these reports it was difficult or impossible to detect error in the control technic; yet time has shown that there was some error as others failed to confirm the results.
Past failures, however, while creating skepticism should not lead to the rejection of new methods. Stewart's report should stimulate others who have adequate facilities for securing controls to try diathermy. Time will tell whether his results can be verified.