. For the rotary pump, ganese and crushed retort carbon, inclosed in a porous vase tem, was laid down. The slabs are 7 feet 6 Inches by 3 feet, around a large carbon plate. The vase Is plunged in a solu- as for the rotary steam engine, many points may be urged composed of wooden blocks, which are… … on which It was laid was also The ends of the revolvers are SILSBY'S ROTARY STEAM FIRE ENGINE.-Fig. 1. found to be In exactly the same ground to the ends of the cylin- condition as on the day It was first put down.—Builder. ders In which they turn. The pump Is precisely like the tive electrode.…
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