Bourne, John, C.E.

Bourne, John, C.E.
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MECHANICAL PRINCIPLES OF THE STEAM ENGINE. CLASSIFICATION OF ENGINES. 1. Q.--What is meant by a vacuum? A.--A vacuum means an empty space; a space in which there is neither water nor air, nor anything else that we know of. 2. Q.--Wherein does a high pressure differ from a low pressure engine? A.--In a high pressure engine the steam, after having pushed the piston to the end of the stroke, escapes into... more...