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Mine Pumping in Agricola's Time and Later   By: (1919-2004)

Mine Pumping in Agricola's Time and Later by Robert P. Multhauf

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CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY: PAPER 7

MINE PUMPING IN AGRICOLA'S TIME AND LATER

Robert P. Multhauf

By Robert P. Multhauf

MINE PUMPING IN AGRICOLA'S TIME AND LATER

Coins are a source of information much used by historians. Elaborately detailed mining landscapes on 16th century German coins in the National Museum, discovered by the curator of numismatics and brought to the author's attention, led to this study of early mine pumping devices.

THE AUTHOR: Robert P. Multhauf is curator of Science and Technology, Museum of History and Technology, in the Smithsonian Institution's United States National Museum.

The habit of heavy reliance on a single source for the substance of the history of Medieval and Renaissance mining techniques in Europe has led to a rather drastic over simplification of that history, a condition which persists tenaciously in the recent accounts of Parsons, Wolf, and Bromehead.[1] Our preoccupation with Agricola, who has been well known to the English language public since the Hoovers' translation of 1912, seems to have inhibited the investigation of the development of the machines he describes so elegantly. More seriously, the opinion that mining techniques remained essentially the same for a century or two beyond his time appears to have hardened into a conviction.[2]

The history of the technology of mining, as distinguished from metallurgy, is largely a history of mechanization, and that mechanization has until the last century consisted principally in the development of what Agricola calls tractoriae hauling machines. That hauling machines of some complexity, Archimedian screws and a kind of noria, were used by the Romans for dewatering mines has been known for some time. Evidence of the survival of this technology beyond the fall of Rome remains to be found, and it is generally agreed that mining activity declined through the first millenium. The revival and extension of mining in the central European areas of German settlement is thought to have occurred from the 10th century, with an intensive development of the region known to Agricola (Erzgebirge) in the 13th century.[3]

This revival appears to have paralleled in general the political and cultural revival, but, as in any mining region, the exhaustion of easily workable surface deposits marked a critical point, when the necessity of deeper mining led to the construction of supported tunnels and the introduction of machinery for removing ores and water from deep mines. On the basis of revisions of capital structure and mining law which he regards as inspired by the financial necessities of deep mining, Bechtel dates this development from the mid 14th century.[4] The mid 14th century situation is confused by the occurrence of the Black Death, which reduced mining activity drastically, and the events of which Bechtel speaks have been put as much as a century later.[5] In any case, the development of deep mining methods had clearly made considerable progress in nonferrous mines when the De re metallica was written, in 1556.

[Illustration: Figure 1. BRUNSWICK SILVER 3 1/2 TALER, Johann Friedrich, 1677. ( U. S. National Museum, Paul A. Straub coll.; Smithsonian photo 43334 C. )]

MINE PUMPING MACHINERY ILLUSTRATED BY BRUNSWICK MULTIPLE TALERS

These large silver coins weighing up to 15 ounces were first issued in 1574 in Brunswick by Duke Julius (1568 1589) of the Wolfenbuttel line. Their historical background is rather unusual and interesting.

In 1570 the Duke decided to increase the output of his silver mines in the Harz and arranged for the opening of three new mines. In order to insure the retention of a portion of this increased silver output under his control, the Duke decided to issue an entirely new kind of silver coin which he called "Loeser," meaning redeemer. These were larger than taler size pieces, and were struck in denominations from 1 1/4 to 16 talers... Continue reading book >>




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