Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Minutes of the course of chemical instruction in the Medical Department of the University of Pennsylvania: for the use of his pupils
Minutes of the course of chemical instruction in the Medical Department of the University of Pennsylvania: for the use of his pupils