Humphrey Potter, encarregado de abrir e fechar as válvulas da máquina de Thomas Newcomen, fê-lo funcionar sem assistência, colocando correctamente cordas e butees para abrir e fechar as válvulas.(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 |
€ 131.67
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Sem data · Engraving
· ID da imagem: 1047063
Private Collection / Bridgeman Images |
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