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Daily Archives: 14. 4. 1824

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1824 – A patent was issued to Valaver for a machine in which dry air was passed over water thus extracting the heat by evaporation

1899 - 1800, United States of AmericaBy Editor14. 4. 1824

A patent was issued to Valaver for a machine in which dry air was passed over water thus extracting the heat by evaporation.

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