BOOK VIII . 33i Many people cover the frame with a green cloth as long and wide as the frame itself , and fasten it with iron nails in such a way that they can easily … A — Head of frame . B — Frame . C — Cloth . D — Small launder . E — Tub set BELOW THE FRAME . F — TUB IN WHICH CLOTH IS WASHED . draw them out and remove the cloth . When the cloth appears to be golden because of the particles which adhere to it , it is washed in a special tub and the particles are…
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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_000033125008455038-281-195.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_000033125008455038-468-295.webp)
