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On this day in 1775, Patriot forces under Colonel Benedict Arnold and General Richard Montgomery attempt to capture the city of Quebec under cover of darkness and snowfall.

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On this day in 1999, the United States, in accordance with the Torrijos-Carter Treaties, officially hands over control of the Panama Canal, putting the strategic waterway into Panamanian hands for the first time.

Crowds of Panamanians celebrated the transfer of the 50-mile canal, which links the Atlantic and Pacific oceans...

Arc light (where the current flows from one electrode through a gas to another electrode) is bright and harsh.

Edison wanted to "subdivide" the light by using the softer glow obtained when electricity passes through a filament and heats it up until it glows.

But the voltaic pile was expensive and could be messy.

The invention of the dynamo in 1866 literally generated new possibilities and a few American and European cities had some of their streets illuminated with arc lights by the end of the 1870s.You will be able to examine the bizarre looking bases and filaments that early light bulbs were once fitted with.You will also learn why early light bulbs have pointed “tips” at the top and why light bulbs were once commonly referred to as Ever since Edison’s first commercial incandescent light bulb came out in late 1879, light bulbs have been used for many lighting purposes - the homes you live in and the schools you attend, the buses and cars you ride on, the aquarium your fish swim in, the tomato seedlings your dad grows in the basement, the ovens and refrigerators that cook and store your food, the ballparks your favorite teams play on, and the streets and parking lots where you and your friends hang out after dark while your parents wonder where you are.When he prematurely announced that he'd come up with the bulb, stock in gaslight companies took a dive.Edison was unable to devote all his time to the quest: He had to redesign the receiver of his telephone system — which was being marketed in England — to avoid infringing on Alexander Graham Bell's patent.If DOE determines that any exempted lamp type doubles in sales, EISA requires DOE to establish an energy conservation standard for that lamp type.

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