23 GOVERNORS FOR [ AIR-COMPRESSORS, FIRE PUMPS, BOILER FEED-PUMPS ] WATERWORKS-PUMPS [ , HYDRAULIC ELEVATORS, MINE-PUMPS, BEER PUMPS, RAILROAD-WASHOUT PUMPS, RAILROAD-WATER-SERVICE PUMPS, GRAVITY OPEN-TANK ELEVATOR PUMPS, VACUUM-PUMPS, AND STEAM-ENGINES ]