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.
Monograph. Cohen, I. Bernard. [Excerpts from "Benjamin Franklin's Experiments"]. Benjamin Franklin's Experiments. Harvard University Press, 1941. Pp. title page, 330-331, 336-337, 338-339. Excerpt. Monograph. 4 Images.