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Concrete

A compact mass, composed of pebbles, lime, and sand, employed in the foundations of buildings. The floating tool or wooden trowel. This is done best proportions are CO parts of coarse pebbles, by sprinkling a little water occasionally on 25 of rough sand, and 15 of lime; others rerough sand, and 15 of lime; others rethe stucco, and rubbing it in a circular direction commend 80 parts pebbles, 40 parts river sand, with the float, till the surface has attained a and only 10 parts lime. The pebbles should high gloss. The durability of the work much not exceed about 1/22 pound each in weight. about pound each in weight. depends upon how it is done, for if not Abbé Moigno, in his valuable scientific journal, thoroughly worked it is apt to crack. "Les Mondes," relates his personal experience