A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 121
the smaller one. C D is the lever by which it is worked, and E F the stationary nut. The pressure is produced at W. If the threads of the larger screw are 1 inch apart, and those of the smaller 3/4 of an inch, the difference is J/4 of an inch. Then, if the extremities of the lever describe a circle… … the advantage gained by this machine to be calculated ? 264. For what purposes are6crews used ? 265. When great pressure is required, what difficulty attends the useof the screw? To remedy this, what ingenious contrivance is used? Describe Hun-ters Screw. With this screw, how great a pressure does…
Physics
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