gromophone and the lamp enclude invention …
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Preeti Dabral 1 year, 1 month ago
Who hasn't heard of the great American inventor Thomas Edison!
His inventions include the gramophone and the electric lamp.
He invented the gramophone at the age of thirty-one only.
Later, he invented the electric bell.
One of his jobs was to improve the telephone first invented by Graham Ball.
Do you know how much he earned by improving it?
A company called Western Union paid 1,00,000 for him.
He had to carry out six thousand tests to make a good electric bulb.
How much patience it must have needed!
Try to get inspiration from the life of Edison.
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