<s id="A18-3.20.01">20 There is another tool with a screw.</s>
<s id="A18-3.20.02">It consists of attaching two posts to the table that support the crossbeam in which is the nut.</s>
<s id="A18-3.20.03">Let the nut be in the center of this [piece of] wood.</s>
<s id="A18-3.20.04">Then we insert the screw into this hole and turn it by means of the spokes that are in the disc, until the screw drops to the board that has been laid on top of the Galeagra, presses it, and the fluid drains.</s>
<s id="A18-3.20.05">One has to repeat the pressing a number of times, until there is no fluid left in the body to be pressed.</s>
<s id="A18-3.20.06">There still are many other kinds of presses, describing which does not appear good to us, however, because their use is frequent and usual among the people, although in effect they are inferior to the ones mentioned by us.</s>
