Humphrey Potter, der var ansvarlig for at åbne og lukke ventilerne på Thomas Newcomens maskine, fik den til at fungere uden hjælp ved at placere reb og butees korrekt for at åbne og lukke ventilerne(Humphrey Potter, in charge of opening and closing the valves of Thomas Newcomen's machine, made it work without assistance by properly placing ropes and butees in order to open and close the valves)French School |
€ 133.81
Enthält 25% MwSt.
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Udateret · Engraving
· Billed-ID: 1047063
Private Collection / Bridgeman Images |
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