26 juill. 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.Ajouté au bande de temps:
Date:
26 juill. 1250
Maintenaint
~ Il y a 775 ans