Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes (1890)
Thurston, Robert Henry, 1839-1903 · New York, J. Wiley & sons · leaf 122
as in thoseengines. The valve stems have no stuffing boxes, but passinto the chest through unusually long and carefully fittedholes, in a hub, made about five one-thousandths of an inchlarger than the rod inside the Babbitt metal bushing,for a length of six diameters or more. The hub isloose in the…
Steam-engines
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