Antique Microscope Slides by David Goligorsky
Aesthetics, Art, Data Presentation, Materials, Medicine, Product Design, Science, Visualization, history
Before the Royal Microscopical Society introduced the rectangular glass slides and cover sheets, a "slider" was made from a disk of ivory or bone that was hollowed out with the sample inside, held between sheets of transparent mica (wikipedia).
The Nonist has a small collection of these Victorian-era sliders, which are incredibly beautiful even without a microscope. (via Monoscope)