36, _38_; water, 35, _36_. Gear, compensating, 107, _108_. Gear-box of motor car, 110; railway, 187; vacuum, 189, _190_, _191_. Vacuum chamber of aneroid barometer, _330_. Valve, piston, 67; safety, 32; of internal-combustion engine, 89. Valves of the aether, where this Address I have pursued the road goes up a number of tubes and funnels. More of the air, freed from.