3D 1893: Columbian Expo Stereoscopes

Just stumbled across the New York Public Library's Digital Archive and its amazing Robert N. Dennis collection of stereoscopic views. It includes a bunch from the 1893 World's Columbian Exposition in Chicago, which I'm loving, as I'm in the middle of reading Erik Larson's Devil in the White City, a great account of the history of the Expo and how it was a hunting ground for America's first serial