ABSTRACT
IN this last picture can be seen a very high wheel, or hauling machine, being rotated or revolved by men or draught-animals walking round in it. Apart from that, men are seen firmly seated upon ropes and descending into the depths, and in return vessels, or buckets, full of ore or water are being lifted up.1 All this indicates, as everyone knows, the method of procedure which miners of metal adhere to and which is applied to their work through necessity: these draught-animals, horses, that is to say, and huge bears,2 are allotted by turns or side by side to rotate the wheels when greater weights are to be raised or let down, and when the minerals that must be lifted could not be brought out more easily from the cavities at the bottom by means of galleries or ladders.
