. The science of railways . lever above mentioned), an intercepting and a re-ducing valve (controlled either positively by theregulating valve or at times automatically by thepressure in the receiver), and a separate exhaustvalve (controlled by the operating valve). The 260 ENGTNEERS^ AND FlHE MENS OPE HAT ION OF COMPOUND LOCOMOTIVES. 261 ^ \^ i.$

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900