Which man helped Thomas Edison establish his first electricity company?

William Joseph Hammer, a consulting electrical engineer, started working for Edison and began his duties as a laboratory assistant in December 1879

Explanation:He assisted in experiments on the telephone, phonograph, electric railway, iron ore separator, electric lighting, and other developing inventions.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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