VARIATIONS IN THE RATIO OF DIAMETERS OF THE NORMAL CHEST AT DIFFERENT AGES.THE FORM OF THE PHTHISICAL CHEST.

INTRODUCTION.  It is proposed to give in concise form records on which may be based deductions of the changes in proportions of the chest, in its development from the fetal state to the adult form. Information will be offered to emphasize the special periods where development is particularly marked, as this study has been but slightly touched on. A general knowledge of the changes in the human chest is given in most of our standard anatomic works without, however, a grouped record on which the statements are based; and the material collected in late years by clinicians and physical examiners, can be very profitably supplemented by using a practical method of summarizing the observations. The study of the human chest is always one of much interest to the medical practitioner for the valuable deductions that may be obtained. The skill with which the diagnostician of the present day utilizes the