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The top documents tagged [durable light bulb]
Light Bulb Second Grade: Use the keynote to supplement the social studies book, Thomas Edison by Greg Linder
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The American Pageant Chapter 24 Industry Comes of Age, 1865-1900 Cover Slide Copyright © Houghton Mifflin Company. All rights reserved
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Thomas Edison's greatest challenge was the a practical electric light. He didn't "invent" the light bulb, but he improved the 50-year-old idea. In 1879,
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Scientists Breakthrough in Electricity
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