FIG. 1.
Posters from the early 1900s, taken from the collection of Stanford Research Into the Impact of Tobacco Advertising (tobacco.stanford.edu). Color images are available online.
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.