William A. Radford · Radford Architectural Company · leaf 36
cementshould be employed for this work. Ce-ments that were free of manganese andiron would be white and the color growsdark as the percentage of iron and man-ganese increases, but most cements have more iron than manganese and the color,therefore, is due to the iron. Sulphate of lime, which always… … Fig. 25—Section showing the details of construction atthe level of the water table, or first floor level. In coloring artificial stone to a gray the use of one pound of Germantown lamp-black mixed with cement dry, and onepound of salt previously dissolved to everyten gallons of water greatly…
