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sodium vapour lamp

Know how halogen and fluorescent bulbs, as well as sodium, mercury, and metal-halide vapour lamps, and LEDs work

Roman bronze oil lamp with lions and dolphins, from the Baths of Julian, Paris, 1st century ad; in the British Museum

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What’s the Difference Between Emoji and Emoticons?

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

Wolfgang Amadeus Mozart. Mozart rehearsing his 12th Mass with singer and musician. (Austrian composer. (Johann Chrysostom Wolfgang Amadeus Mozart)

7 Famous Child Prodigies

Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

7 of the World’s Deadliest Shipwrecks

The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)

11 Banned Books Through Time

Snowshoe hare (Lepus americanus) with its Summer coat on the left side and its winter coat on the right.

7 Animals That Turn White in Winter

lamp: Related Content

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Photos and Videos

sodium vapour lamp

Roman bronze oil lamp with lions and dolphins, from the Baths of Julian, Paris, 1st century ad; in the British Museum

Know how halogen and fluorescent bulbs, as well as sodium, mercury, and metal-halide vapour lamps, and LEDs work

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Topics

safety lamp lantern ultraviolet lamp spotlight cruse lamp wick gas light oil lamp gas mantle Globar lamp candle flare flash lamp rushlight searchlight

Key People

Willis Rodney Whitney

American chemist