moulds are taken in under the box that feeds addressed to Mr. Helton. in the clay, and carried back when they are full, by the reciprocating motion of rack and New Method of Engraving. pinion. The feeding motion is a screw vaned At arecent meeting of the Sheffield Literary pug mill, but the holes… … of the natural pattern, that they might easily perforated at regular intervals so as to admit The accompanying engraving represents an the engine isin motion, the smoke all passes be taken for it. Besides these matters the the small coa! to pass through into the screens, invention of Mr. John T.…
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