s with different de- valve. One is used upon each freight or passenger car. piston one way, and restoring the pressure in the grees of force. With the handle in emergency position, It is by the perfect working of this ingenious, yet train pipe pushes it back again. The former opens brakes are… … pump would be subject to violent fluctuations; at rest with great rapidity. A train of fifty freight c.irs of the one moment, and in violent operation the next. standard box type is about a third of a mile long, yet The engineer’s valve, or “brake valve,” mounted release position, air that has been…
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