<s id="A18-3.02.01">2 In order to lift heavy objects one needs machines; some of these have one support, others two, others again three and some have four supports.</s>
<s id="A18-3.02.02">The one with one support has the following appearance.</s>
<s id="A18-3.02.03">We take a long beam of greater height than the distance to which we want to lift the load.</s>
<s id="A18-3.02.04">Even though this beam is solid in itself, we yet take a rope, tie it to it and wind it in equal spaces around it; let the perpendicular line measured between the individual coils be four hands.</s>
<s id="A18-3.02.05">This way the force of the wood is increased and the coils of rope around it are like a flight of steps for someone who has to do something at the top of the beam, by which the work is made easier.</s>
<s id="A18-3.02.06">If, however, that beam is not strong enough in itself, we have to consider the amount of the load that we want to lift, so that the force of the load does not become greater than the force of that support.</s>
<s id="A18-3.02.07">Thus we put the support perpendicular on a [piece of] wood in which it can move, and tie to the top of this support three or four ropes, pull them towards solid, firm supports and fasten them to them.</s>
<s id="A18-3.02.08">Then we attach to the end of the support pulleys that are tied to it with ropes, and fasten the ropes of the pulleys to the load that we want to lift.</s>
<s id="A18-3.02.09">Hereupon we pull the ropes tight, either with our hands or with some other tool, and then the load rises.</s>
<s id="A18-3.02.10">If one now wants to bring a stone onto a wall or to any place, one unties the rope from one of the firm supports that hold the supporting beam that the pulleys are attached to, indeed on the side opposite to the one to which one wants to bring the stone, and the beam inclines towards that side; then one slowly lowers the rope on the pulley to the place, where one wants to put the stone.</s>
<s id="A18-3.02.11">If, however, one cannot incline the supporting beam that the pulleys are attached to so much as to let the lifted load reach the intended place, then we attach rollers underneath it, on which we let it run, or we drive it with levers so far, until we bring it to the intended place.</s>
<s id="A18-3.02.12">When that has happened, we bring the beam back into its position, towards the side facing us, fasten it again and proceed with it as was done earlier.</s>
