ly adulterate their for building purposes, have caused large steam mills to su- cined that the term plaster of Paris is applied to it, from the sugar plums with very finely ground or elutriated gypsum. persede the old-fashioned method of manufacture. great extent of gypsum existing at Montmartre,… … er ornamental pur- of conveyer is used poses, though it is in flour mills, and bles good limestone or carbonate of lime; but it differs from is located on the left of the crusher inthe engraving. Here it in not, when pure, effervescing with acids and in being the crushed plaster is fed by a hopper,…
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