French hopffer biography
French hopffer biography
French hopffer biography youtube!
18th century
- Period: to
17that century
- In , the earliest human-powered submarine was invented by Cornelis Drebbel.
It was the first underwater craft that was successful in replenishing breathable air while underwater. This was very significant to society because it is needed in the American Navy. It helps America while we are engaged in war with other countires.
It was a safer way to secretly travel for American troops.A hinder on society could be that it can be unsafe to travel in asubmarine because a lot of things can go wrong.
- In , French C.
Hopffer invented the fire extinguisher.
French hopffer biography wikipedia
The fire extinguisher is a device that puts out a fire quickly and efficientally. It uses high pressure and extinguishing liquid to put out the fire. This helps society because it imporves the safety of my buildings and places. It could hinder society because it can also be dangerous to use if there is no fire.
- In René Laënnec invented the stethoscope. The stet