ough it , just as a wedge of beech or iron can be driven through soft wood by means of a tool . If it be softer , the principal vein either drags the soft one with it for a distance of three feet , or perhaps one , two , three , or several fathoms , or else throws it forward along the principal… … A — Principal vein . B — Vein which cuts A obliquely . C — Part carried away . D — That part which has been carried forward . Sometimes venae profundae join one with another , and from two or ' Bore outcropping veins 4 , one is formed ; or from two which do not outcrop one is made , if they are not…
e-rara · Eisenbibliothek Schlatt · No known copyright restrictions. Free to use for anything.
![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_000033125008455038-294-207.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_000033125008455038-49-14.webp)