By the enlightenment his theories where about as popular as tricorne hats are today.
From the guardian.co.uk
Tobias Menzies's Plume is a wenching rover in scarlet coat and tricorne hat.
From the independent.co.uk
The Lord Chancellor wears a tricorne hat, but the other Lords Commissioners wear bicorne hats.
From the en.wikipedia.org
In the 18th century, a cockade was pinned on the side of a man's tricorne or cocked hat, or on his lapel.
From the en.wikipedia.org
They are often shown wearing shabby 17th or 18th century clothing, with a bandana or a feathered tricorne.
From the en.wikipedia.org
Criers often dress elaborately, by a tradition dating to the 18th century, in a red and gold robe, white breeches, black boots and a tricorne hat.
From the en.wikipedia.org
More examples
Tricorn: cocked hat with the brim turned up to form three points
The tricorne (also tricorn, tri-cornered hat or three-cornered hat) is a style of hat that was popular during the late 17th century and 18th century, falling out of style shortly before the French Revolution. ...
Alternative spelling of tricorn; Alternative spelling of tricorn
From French Late 18th Century Term For Hat With Turned Up Brim And Having Three Corners.