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7and it had a projection from each floor, framed with much skill, which was kept in its place by means of large stretched ropes, the roughness of which preventing the feet from slipping, made it easy to get thence on to the wall. The machine could be moved in six directions, straight forward, to the right and left, and from its extent it could be used on the ascending and descending slope of a hill. It could, moreover, be so raised as to throw down a wall one hundred feet in height: so, also, when moved to the right and left, it reached not less than one hundred feet. It was worked by one hundred men, and its weight was four thousand talents, or four hundred and eighty thousand pounds.
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