William A. Radford · Radford Architectural Company · leaf 21
ny,contained. Only clean, sharp and gritty sand, grad-uated in size from fine to coarse and freefrom impurities, can be depended upon forthe best results. Soil, earth, clay and finedead sand are injurious to sand, and 22 CEMENT HOUSES AND HOW TO BUILD THEM. at times extremely dangerous;… … Fig. 23—Sectional view, showing the details of workabout the window caps. Screenings from crushed trap rock, gran-ite, hard limestone and gravel stones aregenerally better than bank sand, river sandor beach sand in Portland cement mortars(but not so when used with natural cement,unless the very…
