Thomas Savery's steam pump or 'the miner's friend', 1702 (1726). Savery's steam powered pump was used for draining water out of mines. From Lexicon Technicum, by John Harris, 1726. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Oxford Science Archive |
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Eigentums-Rechte: | nicht erforderlich |
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