The funky brass thing in 5, above, is a hydrostatic lubricator, used on steam engines. as condensate enters through the top connection, it displaces cylinder oil, which flows out the side connection. Engines running at higher pressures need cylinder and valve lubrication, but at lower pressure, the steam is 'wetter'.
The resistor coils are most commonly used for space heaters. but they are also used in generator field controls.
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