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Name something still useful now that started before 1800 ad (1 Viewer)

The armed forces.

Protecting houses with lightning rods.

Flush toilets.

Democracy.

Submarines.

Bi-focals.

Vaccinations.

Parachutes.

Aquaducts.
Carbonated beverages.

 
In 1795, Nicolas Jacques Conté discovered a method of mixing powdered graphite with clay and forming the mixture into rods that were then fired in a kiln. By varying the ratio of graphite to clay, the hardness of the graphite rod could also be varied. This method of manufacturing pencil lead, which had been earlier discovered by the Austrian Joseph Hardtmuth of Koh-I-Noor in 1790, remains in use.

 
Pretty sure at a visit to Independence Hall, I learned the delegates to the Constitutional Convention sat for rudimentary photographs during their breaks. They could only produce silhouettes, however, instead of full-detail pictures. Can't remember what the process was called.
daguerrotype

 
Plows

Books

Toilet

Steam engine

Circular saw

Fire extinguisher

Bifocals

Battery

 
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McGarnicle said:
MC Gas Money said:
Das Boot said:
MC Gas Money said:
Nobody invented prostitution and pornography.
Pretty sure someone somewhere was first.
All sex is prostitution on some level
Usually true, but there are lots of girls who really just want occasional no-strings pounding. They are God's most wonderful creatures.
For once we find ourselves in agreement]

 
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