Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 435
it is notso brittle as flint, though its hardness is nearly the same. It is feebly translucent; its colors arepale and dead, of a whitish, grayish, or yellowish cast, sometimes with a tinge of blue. The surface of the stone (Fig. 3048) is technically made up of the eye (n), the bosom (z), and… … MILLSTONES. 417 t and its branches. The grooves which expedite the grinding action are termed furrows, and thelevel surface between the latter the lands, x. v is the skirt furrow, and the branch furrow nearest theeye of the stone is called the second furrow, u. Referring now to Figs. 3049 and 3050,…
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