Trapezoidal Screw Threads

Famous quotes containing the words screw and/or threads:

    Let us have a good many maples and hickories and scarlet oaks, then, I say. Blaze away! Shall that dirty roll of bunting in the gun-house be all the colors a village can display? A village is not complete, unless it have these trees to mark the season in it. They are important, like the town clock. A village that has them not will not be found to work well. It has a screw loose, an essential part is wanting.
    Henry David Thoreau (1817–1862)

    All is waste and worthless, till
    Arrives the selecting will,
    And, out of slime and chaos, Wit
    Draws the threads of fair and fit.
    Ralph Waldo Emerson (1803–1882)