The practical draughtsman's book of industrial design and machinist's and engineer's companion : forming a complete course of mechanical, engineering and architectural drawing (1866)
Armengaud, M. (Jacques Eugène), 1810-1891, Armengaud, M. (Charles), 1813-1893, Amouroux, M. (Jules), Johnson, William, 1823-1846 · Philadelphia : H.C. Baird · leaf 176
ges—economy in ma-nufacture, simplicity and effective ven-tilation, increased production of meal,and a saving of labour in repairs. Fig.4 is a vertical section of the stone, andfig. 5 is a corresponding plan. The eye, a, is made excessively large inproportion to the stones diameter, ex-ceeding,… … 166 THE PRACTICAL DRAUGHTSMANS between the working surfaces by the action of the centrifugalforce. Besides, the increased circumferential length of the eyeadmits of the formation of three or four times the ordinary numberof leading furrows, for the distribution of the air over the grindingsurfaces,…
