The Telharmonium: world's first electronic musical instrument, uses another invention: the telephone, has disappeared forever, The Rejuvenator: used to cure medical conditions, users placed electrodes on any part of their body and a small electric current was passed through it., it was unclear exactly how the machine worked, The Writing Ball: a machine for typing, you could not see the paper as you were typing, other machines became more popular because they were made in factories, The Antikythera Mechanism: was discovered at the bottom of the sea near the Greek island, for many years, nobody understood what the machine was for, it had been designed to predict the movements of the sun, the moon and the planets,

Solutions Pre-Inter Inventions the world forgot

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