Dixi de uariis arenac,in qua auri rameta infunt^lauadse rationib,nuc dica 

 de materias permiftaz cu lapillis nigris,ex quib.plumbu candidii conficitur, 

 lauada? rationib,quarij od:o funt ufitatasratq^ ex his duae nuper inuetac .Ta 

 lis aut materia metallica pleriiqp a uenis 8c fibris impetu aquarii abrcpta lori 

 sc htec^ reperitur: etfi interdu uenze dilatatac ex eade conftant : illa matcria 

 mlTbrcs ligonib.latis eruijt,hanc cufpidatis effbdiiinfed anatis roftro fimili 

 bus excindiJt lapillorum expertcquas no raro in id genus uenis reperiri fo* 

 let.VeriJ in Iocis,qui ea cotinet,fi abundauerint aquis, SC ualleftres aut mol 

 liter dcuexi Sc cocaui fijerint,ut riui in eos deduci poflint,lotores ecftiuis di 

 «bus primo fofsa agiit longa Sc decliue,ut aquac permanates rapide feratur, 

 Deinde materia metallica fofla a<fla deteda una ciJ cute , qua^ alta eft pedes 

 plus minus fex,&r coagmetata coftat ex mu{co,ex radicib, herbaru, fi-uticii, 

 arborii,ex terra,utrincp ligonib.Iatis fodiijt,et in aquas,quaj manat pier fofi 

 {am,der)ciiit.Tij arcnaj 8c lapilli nigri,quod graues fint,in fijndo fofli rcfi> 

 det:mufcu et radices,qd leues,aqua2 ex fofTa defliueces rapiut.Ne uero fimul 

 rapiat lapillos nigros infimij foflsc cefpitib,& lapidib.obftruitur: at ipfi lo* 

 tores, quorii pedes tegiitur altis peronibus ex corio, no tame crudo, fadis, 

 ftant in fofla , & radices arborij fruticij herbaru ligneis furcis fcpticornibus 

 cx ea eiiciiit : atq; lapillos nigros ad caput foflas repellijt. Poftqj fpacio qua 

 tuor hebdomadaru in hac re cofumpferint multij operae Sc laboris,ifto mo 

 do tollijt lapillos nigros:arena ciJi ipfis mifta identide ex fofla batillis ferreis 

 fublatam huc & illuc in aquis agitant ufcp dum arena ex eis defluat Sc deci-< 

 dat in foffam , foh lapilli nigri reftcnt:quos omnes colledos rurfus in lacu^ 



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