Earth May Revolve Around Sun

Earth May Revolve Around Sun
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The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great inventions. In one of the cabinets is to be seen Morse’s original model of the telegraph instrument, fashioned by his own hands. The model is very crudely made, but it inspires […]


আরও পড়ুন Earth May Revolve Around Sun