<s id="A18-3.03.01">3 The machine with two supports is made in the following way.</s>
<s id="A18-3.03.02">One uses the tool called <ou)do\s> and erects the supports on it.</s>
<s id="A18-3.03.03">Let these incline towards the top a little, for about one fifth of their lower spacing.</s>
<s id="A18-3.03.04">Then one fastens the two supports to the base, so that their two (lower) ends are connected to each other, and one attaches to the (upper) ends of the supports a crossbeam, to which is fastened a block and tackle.</s>
<s id="A18-3.03.05">Let another block and tackle be at the stone.</s>
<s id="A18-3.03.06">Then one tightens the rope, as was done earlier, either with the hands or by a draught animal, and so the load rises.</s>
<s id="A18-3.03.07">For these supporting beams to remain upright, they have to be tied with ropes, as described before.</s>
<s id="A18-3.03.08">Then we bring the stone into the necessary position and transport the base to the other side of the building, depending on need.</s>
