JF Ptak Science Books Quick Post
I was working my way through an edition of Nature for 1884 (23 October, page 606) when I found a review of F.W. Cory's How to Foretell the Weather with the Pocket Spectroscope (1884). The title was enough, and the review even more so--I knew this was an obscure work, but not so much anymore, as the entire book is located online! Sometimes I get used to the sci-fi aspect of the intertubes, but when I make discoveries like this I am reminded all over again how magnificent all of this is.
[Source: University of California Libraries via Internet Archive, here.]