466 DE RAB METALILIcA

mobilis maneat, utrinq; muniatur, eũ uenæ ſulfureæ in ollas, in fornates epoſitas, cõiectæ fuerint eas cõfeſtim operculare,& qua cũ operculo coniun-guntur, luto oblinire conuenit ne ſulfur exhalẽt: eadẽ de cauſa ollæ ſubiectæoperculis tegantur& luto oblinantur:lignis accenſis uenæ coquantur uſedum ſulfur exhalarint: uapor ſublatus dum per narem penetrat in ollam ſubiectam craſſeſcit in ſulfur: quod ceræ liquefactæ ſimile in fundum deciditzexquo cum è foramine, quod ad ollæ fundum eſſe dixi, defluxerit excoctoruelpanem efficit, uel cannas bacilla ue format, uel ſulfurata, exilibus lignis in idintinctis, conficit: mox ardentia ligna& prunas ex fornace extrahat eaq; refrigerata duas illas ollas aperiat,& exinaniat purgamentis: quæ, ſi uenę compoſitæ fuerint ex ſulfure& terra, cineris ſua ſponte reſtincti, ſimilia ſunt: ſinex ſulfure& terra& lapide, uel ex ſulfure& lapide tantum, terræ ualde ſiccatæ, uel lapidi multum toſto:poſthæc ollæ rurſus uenis cõpleantur,& eademiſta omnia iterentur. 1

Ollæ quibus nares ſunt A. Olla uacans nare B. Opercula c.

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Sed miſta ſulfurea, ſiue ex lapide& ſulfure tantũmodo cõſtiterint, ſiue exlapide& ſulfure& metallo, coquãtur in ſimilib. ollis, ſed in fundo perfora-tis: fornax ſic ſe habeat: ad murũ officinæ 11. extruantur latericij parietes, altipedes vil. lõgi tres, craſsi ſeſquipedẽ. Ni diſtẽt inter ſe pedibus xxVIIinterquos itẽ latere ducãtur vil. muri humiles, utpote alti pedes 11.& totidẽ digi

tos, ſed lõgi, ęque ac parietes, pedes II. craſſi unũ, parib. interuallis inte 12parie