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
! i … 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…
Mechanical engineering · Mechanics · Engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
