rs, which range prefer- pinions which mesh with each other and form a train coming water first into one chamber and then into the ably at right angles to the bore of the ferrule. The of gearing for revolving all of the grate bars from a others. In large meters there are two plungers, P P, forcing… … nections, the inner thickness of each cover being con- DE PEREIRA'S FURNACE GRATE. tanning process, the employment of which is reported to be spreading in Germany. In this system a com- ferentially fluted bars in the center of the furnace, pound known as pyrofuscine, which contains carbon, whence…
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