1 mai 1752 - Benjamin Franklin Invention
Description:
In 1752, Benjamin Franklin made the lighting rod . He tested out a theory that he would put a handkerchief to two crossed sticks of proper length into a kite. His theory didn't work out but other people tried it and it somehow worked for them.Ajouté au bande de temps:
Date:
1 mai 1752
Maintenaint
~ Il y a 272 ans
