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Machines and Apparatus in General.

Class 52.—Separate pieces of machinery: bearings, rollers, slide-bars, eccentrics, toothed wheels, connecting-rods, cranks, parallel joints, belts, funicular apparatus, &c. Gearing, spring and catch work, &c. Regulators and governors.

Lubricators.

Machines for counting and registering. Dynamometers, steam gauges, weighing machines. Gauges for liquids and gas.

Machines used for moving heavy weights.

Hydraulic machines for raising water, &c.; norias (chain pumps), scoop wheels, hydraulic rams, &c.

Hydraulic engines, water wheels, turbines; hydraulic lifts; centrifugal, steam, and other pumps.

Accumulators and hydraulic presses.

Steam engines. Boilers, steam generators, and apparatus appertaining thereto.

Apparatus for condensing steam.

Machines set in motion by the evaporation of ether, chloroform, ammonia, or by a combination of gases.

Machines set in motion by gas, hot air, and compressed air.

Electro-magnetic machines. Windmills and panemones. Air balloons.