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Updated: May 11, 2025
Additions to human power. The force necessary to move a stone along the roughly-chiselled floor of its quarry is nearly two-thirds of its weight; to move it along a wooden floor, three-fifths; by wood upon wood, five-ninths; if the wooden surfaces are soaped, one-sixth; if rollers are used on the floor of the quarry, it requires one-thirty-second part of the weight; if they roll on wood, one-fortieth; and if they roll between wood, one-fiftieth of its weight.
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