jul 26, 1250 - Magnifying glass (Flea glasses) invented
Description:
In 1250 an Englishman named Roger Bacon invented the Magnifying glass. The magnification was from x6 - x10 and they were known as flea glasses as they were used for inspecting tiny insects.Added to timeline:
Date:
jul 26, 1250
Now
~ 775 years ago