<s id="A18-3.05.01">5 As now for the tool with four supports, it is used for enormous loads.</s>
<s id="A18-3.05.02">It consists in erecting four pillars of wood in the form of a square enclosure with parallel sides, so far apart that the stone can easily be moved and lifted in it.</s>
<s id="A18-3.05.03">Then we attach to the ends of these pillars pieces of wood that are connected with one another, we make them firm and secure.</s>
<s id="A18-3.05.04">Onto these pieces of wood we put in opposite order (i.e. diagonally) others again, so that all supports are connected with one another.</s>
<s id="A18-3.05.05">Hereupon we fasten the block and tackle in the center of these [pieces of] wood, at the point, at which the [pieces of] wood meet one another.</s>
<s id="A18-3.05.06">Now we fasten the ropes of the block and tackle to the stone, tighten them, and the load rises.</s>
<s id="A18-3.05.07">One has to take care, however, not to use nails or pegs with the mechanical tools, indeed, with any load, in particular, however, with big loads; on the other hand, we use ropes and lines and tie together with them what we want to, instead of wanting to nail something.</s>
