|19th Century Drawing of a Lewis Lamp|
The drawing above shows the Argand Lamp in the center. The Argand Lamp (invented by Swiss-born physicist Aime Argand in 1782) used a circular wick placed between two thin concentric brass tubes, and enclosed within a glass chimney. To the right is the thin, silver-plated copper reflector. On the left is the lens. A reservoir to hold the oil is situated behind the reflector.
Unfortunately, Lewis' parabolic reflectors tended to warp, resulting in a spherical shape. And the lenses were quickly covered with soot, greatly reducing the luminosity.
In 1849 ten lamps and twenty-one reflectors replaced the original apparatus. In was not until 1854 that a much more efficient fourth order Fresnel Lamp replaced the original reflecting-illuminating lamps.
This month's Ocracoke Newsletter is a brief history of Howard's Pub. You can read it here: https://www.villagecraftsmen.com/news082117.htm.