Casebooks

the white stone of vitrioll

℞ y^e oile of vitr, distill it  latus,  retortā poure it into y^e same retorte agayne & distill it agayne doe this 3 {or} 4 tyes then set it in balneo to digest 4 or 5 days & nights then set {illeg}hed vppon it & still it  balneū {illeg}llious & y^t w^ch is distilled poure on agayne vntill all come over {th}is is the sweet oyle of vitrioll {th}en put it into a phil. egge & fix it in a fixing furnace & there wilbe sweete stones of vitr & white w^ch will dissolve in ons mouth {illeg} dosis gr iiij in ext plauges {illeg}{gr}es fevers smale pox measells this is y^e great arcanū {illeg} these w^ch by working in mines {sh}all get g extreme sicknesses. note y^t if y^e Retort breake in the begyning you take out terrā phil & mingle it w^th the oyle & so ceede {illeg} till all the earth come over/