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combining materials into mortar. See Mortarmill. Mortar-mill Mor′tar-mill. In the mortar-mill the sand, lime, and mortar are compounded together by rakes attached to the arms of a revolving wheel that moves round in a circular bed. In the examples given,— a is a large loam and mortar mill on the Chilian principle. b is a mortar-tempering machine turned by handcrank. c is a mortar-mill on the same truck with the steam-engine which rotates the edge-stones in the bed. Pitcher's mortar-mill Fig. 3231 shows a mortar-mill on a large scale, occupying several floors of a building. The lime is slaked in a revolving barrel A, and discharged into a settling-vat. From this the paste passes to the curing-vat R, and is pumped thence into the upper one of three mixing-cylinders B C D. These revolving cylinders are slightly tapering, and have teeth on their inner surfaces, which mix the materials and gradually forward the mortar to the discharge end. It passes from one