Going through some old microscope slide cabinets the other week, came across some that were quite old. Oldest I've found so far are 1866, most of the ones in the photos below are either pre-1900, or just about 1900.
Slides 1 by
Chris_Moody, on Flickr
Slides 2 by
Chris_Moody, on Flickr
Slides 3 by
Chris_Moody, on Flickr
I want to try and track down the history on some of the names on the slides, and figure out a way to present these