Painters' colours, oils, and varnishes : a practical manual (1906)
Hurst, George H. (George Henry) · London : Charles Griffin & Company · leaf 369
rial and the degree of the 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 corrugations are arranged rather differently by… … Fig. 44. on the grinding power of the stone mill; the best form is that shown at A in Fig. 44, 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 it ; the shape shown at B is bad, as such a stone has little grinding…
Paint · Varnish and varnishing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
