The second machine of this genus turns the blowing wind into a shaft through a long box - shaped conduit , which is made of as many lengths of planks , joined together , as the depth of the shaft requires ; the joints are smeared with fat , glutinous clay moistened with water . The mouth of this…
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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_000033125008455038-178-116.webp)
![An illustration from Historiarvm memorabilivm ex Exodo, sequentibusq́ [] libris descriptio (1558)](https://img.insideoutlibrary.com/img/200/ia-historiarvmmemor00borl-80-68.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_000033125008455038-399-262.webp)