BOOK IX . 437 these holes wedge - shaped pegs are driven , in order that the beams may remain fixed , and that the box may turn round , and may be turned toward the wind from whichever quarter of the sky it may blow . In such a hearth they put … A — Box . B — Pivot . C — Transverse wood beams . D — Grate . E — Its feet . F — Burning wood . G — Stick . H — Pans in which the bismuth is melted . I — Pans for moulds . K — Cakes . L — Fork . M — Brush . an iron grate , as long and wide as the box and threequarters of a foot high , it has six…
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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_000033125008455038-265-180.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_000033125008455038-479-303.webp)
