1 Take of the Caput mortuum of Aqua fortis (made of 3 parts of crude vitrioll & 2 of saltpetre) & <of> either of the Chromiall Mineralls finely powdered equall parts mix these well together and let them boyle well with stale urine in an Iron Kettle for 12 or 14 houres still renewing the urine as it waits till towards the end of the operation when it must be boyld all away till the residue be left drie. put this prepar'd matter into an Iron Still & in a strong & lasting fire draw of what will come over in one day & then exposeing <the> matter that remaines behind for some days & nights to the open Aire destill it the second time as you did the first & soe if need be you may doe it the 3d & 4th time alsoe. Note that <if> the Minerall you deale in be Stannello you may add when you boyle it when with urine †about you may ad deleted about the fourth part †in deleted of the <weigh of the> minerall of strong potashes

2 Otherwise you may worke the same mineralls with Calcin'd vitrioll     space of 10-15 letters part Lap. Claminaris     space of 4-6 letters part & the greene Calcinatum     space of 2-4 letters part mixing these well together & drawing them over as before.