rds. the powder, provided with a slender tube, B, at the top, ner described. It will be seen that this mode of adjust- This machine performs the whole labor of grinding the and a round, air-tight india-rubber ball,C, at the bottcm. ing the length of clay and screening The ball communicates with the… … tiles per hour. most ornamenta prevent the powder from passing into the ball. A me. The machine is and elegant part tallic plate, D, is attached to the bottom of the ball, and, made of iron, and of the harness. by pressing this plate suddenly, the air is forced through The patent for this invention…
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