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29 Meanwhile, Thomas was working on an electric light so people could
read past dark. After changing his design many times, he created an

incandescent light bulb that burned all night!
30 Henry was determined to make his vehicle work, so he took a job at a
company that made engines. One day he repaired a fancy engine from
England. It had a four-stroke cylinder that burned gas to create power.
Fascinated, he built a model of the engine to see how it worked.

31 After that, Henry spent long nights, and Saturdays, working on his car.
Friends and coworkers helped, too. When he finally rolled his creation out of
his workshop, it had two cylinders for double the power, a three-gallon tank
for gas, and four bicycle tires for wheels.

32 Henry’s Quadricycle could go up to twenty miles per hour—but it cost a
fortune to make. Most people thought his rattling gas buggy was a joke.

incandescent Something that is incandescent gives off a lot of light.
cylinder A cylinder has circular ends and straight sides. In an engine, a cylinder takes
in gas to make other parts move.

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