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Bill Thayer |
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FISTU′CA, an instrument used for ramming down pavements and threshing floors, and the foundations of buildings (Cato, R. R. 18, 28; Plin. H. N. XXXVI.25. s61; Vitruv. III.3 s4 § 1, X.3 s2 § 3); and also for driving piles (Caes. B. G. IV.17). When used for the former purpose, that of making earth solid, it was no doubt a mere log of wood (shod perhaps with iron), with handles to lift it up; just like a paviour's rammer. But in the case cited from Caesar, where it was used for driving the piles of his bridge over the Rhine, it is almost evident that it must have been a machine, something like our pile-driving engine or monkey), by which a heavy log of wood, shod with iron, was lifted up to a considerable height and then let fall on the head of the pile.
a Caesar's bridge over the Rhine, one of the great engineering feats of Antiquity: the Rhine is wide, the current is fast, and Caesar built the bridge in very little time under field conditions. The piles of the bridge — driven by our festuca — have been found: see this page for actual photographs of them, and of the branding irons used to mark the construction wood.
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b pile-driving engine: See this Portuguese page or its English translation for a pile-driving machine. The particular model shown is a Renaissance refinement, but it is very similar to what was available in Antiquity.
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Page updated: 2 Oct 06