BOOK VIII . 349 teeth , and now again levelled down with a hoe , both of which are made of iron . The very fine tin - stone requires to be burned less than that of moderate size , and this again less than that of the largest size . While the tin - stone is being thus burned , it frequently happens… … A — Furnace . B — Its mouth . C — Poker . D — Rake with two teeth . E — Hoe . The burned tin - stone should then be washed again on the strake , for in this way the material which has been run together is carried away by the water into the cross - trough , where it is gathered up and worked over ,…
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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_000033125008455038-449-285.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_000033125008455038-491-312.webp)
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