Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 138
Below the upper head of the boiler is placed a metallic shield Q Q, leaving an annular steam spactef a few inches around it, which will, in a great degree, repress the foaming of the water when tl.£pressure is taken off by the admittance of steam into the cylinder, and will thereby prevent the… … ous, and frequently destructive, result of the entrance of water with the steam. Under this arrange,ment i.f the shield, the steam is drawn equally from all parts of the circumfeience of the boiler.The production of a free and perfect circulation of the water in a boiler lias frequently been…
Mechanical engineering · Mechanics · Engineering
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