Figure 2 shows two shaft-houses covering pumps driven by Stangenkunsten. The source of power, hidden by the curious "log cabin" at the right, was probably a waterwheel. I have not found evidence that the Stangenkunst was used to operate bucket hoists, as appears to be the case here. It will be noticed that the above and below ground portions of these illustrations do not correlate precisely. This coin, like the others, shows miners doing various things familiar from Agricola--divining, digging, carrying, and operating windlasses. Figure 3 exhibits the principal advantage of the Stangenkunst, in its utilization to connect a waterwheel located in a valley stream to driven machinery on the mountain some distance above. The lute-playing girl (Lautenspielerin) refers to the Lautental mine. A Stangenkunst (fig. 7) existed here as recently as 1930. The mines shown in figures 1-3 are in the Harz region. Figures 4 and 5 show the St. Anna mine in the Erzgebirge, near Freiberg, as illustrated on a medal in the Brunswick museum. Prominent in figure 4 is an aqueduct, one function of which is to supply a waterwheel in the house below, which in turn delivers power through the Stangenkunst to two open shafts. The reverse (fig. 5), an unusually fine view of the inner workings of a mine, shows, above ground, a typical horse whim driving a bucket windlass. Below ground is shown a crank-driven piston pump typical of those driven by Stangenkunst. In this case, however, it is driven by an underground vertical treadmill. [Illustration: Figure 3.--BRUNSWICK SILVER 4 TALER, Ernst August, 1685. (_U. S. National Museum, Paul A. Straub coll.; Smithsonian photo 43334-A._)] [Illustration: Figure 4.--MEDAL, 1690, SHOWING ST. ANNA MINE, near Freiberg. (_Photo courtesy of Stadtisches Museum, Braunschweig._)] [Illustration: Figure 5.--REVERSE OF MEDAL shown in figure 4. (_Photo courtesy of Stadtisches Museum, Braunschweig._)] The resemblance of the German term for bag (Bulge) to the Latin term for bucket (bulga) instead of the Latin term for bag (canalis), and the presence of buckets (Kuebeln), bags (Bulgen), pockets (Taschen), or cans (Kannen) as components of three of Agricola's four categories of hauling machines are reasons enough for the apparent superfluity of German names, if not for his decision to avoid the use of German names. But it should also be noted that the names sometimes refer to a pump and its prime mover considered as a single machine. Such is the case with the Kehrrad, a bucket windlass driven by a reversible waterwheel which Agricola describes as his largest hauling machine.[10]