EditorialDischarge by means of a push rod pump_9, Using mechanics, a gearwheel driven by a waterwheel moves the boom-type gravity pump, pumping water from the mine across multiple wells, drainage, woodcut, p. 147, (Liber sextus), Manuel, Hans Rudolf (graveur su...
EditorialModel of a 30-Pounder Gun on a Pivot, Model of a 30-pound cannon on slide and turn carriage, on the aft deck of a paddle steamship. The wooden barrel is 27.4 cm long, has a flat grape with refraction ring and a visor on the tapes. The upper chaff, narr...