Wikipedia tells us: “A microscope slide was originally a ‘slider’ made of ivory or bone, containing specimens held between disks of transparent mica. These were popular in Victorian England until the Royal Microscopical Society introduced the standardized microscope slide in the form of a thin sheet of glass used to hold objects for examination under a microscope.”

I’d like to add the following: Antique microscope slides, looked at from a strictly aesthetic standpoint (egged on by a design obsessed brain obviously) are some of the most elegant and perfectly beautiful human artifacts on planet earth. You can quote me on that. See below for irrefutable scientific aesthetic evidence.

Via CP