Page:Popular Science Monthly Volume 81.djvu/138

132 to the establishment of pharmacology and experimental pathology. Medicine, in the sense of internal medicine, benefited by each and every advance in each and every one of its contributary branches, and, through the application of the principles of physics and chemistry to methods of diagnosis, gained its present large equipment of instruments of precision and means of exact interpretation; surgery in like manner gained the X-ray and many technical and mechanical procedures; and preventive medicine, utilizing the knowledge obtained through bacteriology, protozoology, immunity and chemistry, shares, with the science of engineering, the glory of promoting in greater degree than all other factors the social and industrial welfare of humanity.

The facilities and opportunities possessed by American universities for the continuance of this progress will be the subject of the fifth lecture.