Painters' colours, oils, and varnishes : a practical manual (1892)
Hurst, George H. (George Henry) · London : Charles Griffin & Company ; Philadelphia : J.B. Lippincott Co. · leaf 330
ries consider- ably, and is dependent on the kind of material and the degree of fineness of the grinding ; usually from ^ to 1 ton of material may be considered a fair day's work. The surfaces of the stones are usually corrugated so as to increase the cutting or grinding power of the stones ; these… … c Fig. 38. tangential to the circumference. Their shape has some influence on the grinding power of the stone mill * the best form is that shown at A in Fig. 38, the stone moving in the direction of the arrow ; the back edge of the corrugation acts like a pair of shears on the material, and cuts…
Paint · Varnish and varnishing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
