A Daily History of Holes, Dots, Lines, Science, History, Math, Physics, Art, the Unintentional Absurd, Architecture, Maps, Data Visualization, Blank and Missing Things, and so on. |1.6 million words, 7500 images, 4.9 million hits| Press & appearances in The Times, Le Figaro, Mensa, The Economist, The Guardian, Discovery News, Slate, Le Monde, Sci American Blogs, Le Pont, and many other places… 5000+ total posts since 2008.
Contact johnfptak at gmail dot com
JF Ptak Science Books Quick Post 
I own this series of stereoviews but they have yet to surface in our recent move–I did bump into them online at the beautiful University of Heidelberg site, nicely reproduced, though without the the rich glossy blacker-than-black finish in the originals–but these will work nicely.
Max Wolf, Stereoskopbilder vom Sternhimmel (1. Serie), Leipzig, 1913.
Source: University of Heidelburg