You can search for some magazines through Google Book Search new, of note… Popular Science, Popular Mechanics & Bulletin of the Atomic Scientists. All of the magazines also have a map at the bottom so you can see where things were and/or mentioned, oh and some ads from Google – they are likely doing some type of revenue share with the publishers in that program. More info @ the Google blog.
Popular Science. Looks like they have 1890 to almost present.
Popular Mechanics. Looks like they have 1900 to almost present.
Bulletin of the Atomic Scientists.
Thanks for this article. I was able to find the plans for an audible tachometer that was in the December 1968 Popular Science.
I built it 40 years ago when I was in high school, still making my electronic projects with vacuum tubes.
I’m glad Make is around now to pick up the slack.