Carpentry: a water-mill, for pulling boats through a lock. Engraving by Prevost after Lucotte. https://www.rawpixel.com/image/13968618/image-paper-person-waterFree Image from public domain licenseCarpentry: a water-mill, used for pulling boats through a lock []. Engraving by Prevost after Lucotte. https://www.rawpixel.com/image/13974110/image-paper-airplane-waterFree Image from public domain license