Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 216
sider safe. With very heavy pressures and slow speeds, the lubricantmay be forced out and journal and lubricant be brought into close bearing, while with light pressure and low speeds the journals float on the film offluid, and the frictional resistance is independent of the materials of which… … Fig 395a. 200 MECHANICS. per square inch, while Prof. Thurston, with heavy loads of 1,000 pounds per square inch,as on the crank-pins of the North River steamboat engines, found the coefficient of fric-tion was one half of one per cent, the unguent being sperm oil. Practically, it may besaid that…
Mechanical drawing
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