Old Scientific Americans Free Online (for a short time)

For the month of November, the world has free access to the 1845-1909 issues of Scientific American.

So you can see things like 16 year old Lovecraft's letter about Yuggoth, er... I mean Trans-Neptunian Planets.

You steampunkys can pretty much pick a random issue from the 1890s or the Naughties and go bananas over the illustrations and ads.