From the April 1967 issue of Popular Science, page 1. You can now read every issue of every Popular Science magazine in history due to a partnership between PopSci and Google. The ads alone are pretty awesome, but some of the articles are even better. The April 1967 issue has a feature article on how helicopters can relieve traffic problems, as well as an article by Walter Cronkite about what the year 2000 will be like, and letters about things like poor TV and radio reception.
I could spend the next year or two just looking for amusing ads.