it thick , seven digits wide , and six digits deep . Those who use three stamps , as is common , make them much larger , and they are made square and three palms broad each way ; then the iron shoe of each has a total length of two feet and a palm ; at the lower end , it is hexagonal , and at that… … A — Stamp . B — Stem cut out in lower part . C — Shoe . D — The other shoe , BARBED AND GROOVED . E — QUADRANGULAR IRON BAND . F — WEDGE . G — TAPPET . H — Angular cam - shaft . I — Cams . K — Pair of compasses . 21
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![An illustration from Georgii Agricolae De re metallica : libri XII. Quibus officia, instrumenta, machinae, ac omnia deni[que] ad metallicam spectantia, non modo luculentissimè describuntur, sed & per effigies, suis locis infertas, adiunctis latinis, germanicis [que] appellationibus ita ob oculos ponuntur, ut clarius tradi non possint. ; Eiusdem De animantibus subterraneis liber, (1556)](https://img.insideoutlibrary.com/img/200/ia-gri_000033125008455038-144-93.webp)
![An illustration from Georgii Agricolae De re metallica : libri XII. Quibus officia, instrumenta, machinae, ac omnia deni[que] ad metallicam spectantia, non modo luculentissimè describuntur, sed & per effigies, suis locis infertas, adiunctis latinis, germanicis [que] appellationibus ita ob oculos ponuntur, ut clarius tradi non possint. ; Eiusdem De animantibus subterraneis liber, (1556)](https://img.insideoutlibrary.com/img/200/ia-gri_000033125008455038-279-193.webp)
![An illustration from Eyn schön nützlich Büchlin vnd Vnderweisung der Kunst des Messens mit dem Zirckel, Richtscheidt oder Linial : zu nutz allen Kunstliebhabern fürnemlich den Malern, Bildhawern, Goldschmiden, Seidenstikern, Steynmetzen, Scheinern auch allen Andern so sich der Kunst des Messens (Perspectiua zü latin gnant) zügebrauchen Lust haben : darin Man auch solche Kunst leichter dan ausz etzlichen hieuorgetruckten Büchern begreiffen vn lernen mag mit vil [i.e., 56] schönen darzü dienenden Figuren (1531)](https://img.insideoutlibrary.com/img/200/ia-eynschnntzlichbc00rodl-76-98.webp)
