PYRAMIDION (diminutive of pyramid), an architectural term for the copper-gilt casing covering the apex of an obelisk, and generally extended to its upper termination of pyramidical form.
It is now ready either for incorporation with sulphur and other materials, or for agglomeration into solid masses by means of the masticating machine - an apparatus which consists of a strong cylindrical cast-iron casing, inside which there revolves a metal cylinder with a fluted or corrugated surfa
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