Heron Alexandrinus, Mechanica, 1999

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    <archimedes>
      <text>
        <body>
          <chap n="2">
            <pb n="32">
              <s id="A18-2.32.01">32 Since we have just proven for each one of the individual powers that by a given force a given load can be moved, we have to add that, if all machines to be constructed could be turned with a file, even in weight, evenness and smoothness, one could apply for each individual one of them the procedures mentioned, according to those ratios.</s>
              <s id="A18-2.32.02">Since it is however not possible for humans to make them in perfect smoothness and evenness, one has to increase the forces because of the friction of the machines that occurs, and enlarge them, by building them in larger scale than according to those ratios that we have mentioned, so that no hindrance occurs, while our observation of the use of the tools declares incorrect that for which the proof has just been found correct.</s>
            </pb>
          </chap>
        </body>
      </text>
    </archimedes>
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