Regulators, Dynamometers, Pneumatic and Hydraulic machinery.
Most of the mining is done in hydraulic and tunnel claims in deep hills.
The first Otis elevators were moved by steam or hydraulic power.
It is wonderful to see how the bulk of a bale can be reduced by hydraulic pressure.
The hydraulic power of Virginia greatly exceeds that of Pennsylvania.
Methods of collection of water, 153;of securing fall for hydraulic rams, 175.
Engines, hydraulic rams, and water-wheels are also employed.
Johnny touched a control that freed his chair in its hydraulic gimbals.
Where the stream is on a lower level than the building a hydraulic ram can be used.
I have not seen the hydraulic spade used, perhaps that is the best.