26 lugl 1250 anni - Magnifying glass (Flea glasses) invented
Descrizione:
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.Aggiunto al nastro di tempo:
Data:
26 lugl 1250 anni
Adesso
~ 775 years ago