df €f)pmital jpgectpftattom 7 



oil of Sulphur made by a glafs-bell 

 precipitates Corals, Pearls, <&c. dif- 

 folved in Spirit of Vinegar 5 as is 

 known to many Chymifts, who now 

 ufe this OleUm Sulphuris per Campa* 

 nam to make the Magiftery of 

 Peatls, &c. for which vulgar Chy- 

 rtiifts imploy Oknm Tart art per deli- 

 quium. 



I have fometimes made a Menflru- 

 Urn^ wherein though there were both 

 Acid andAlcalizIate Salts^yet I did not 

 finely that either acid Spirits or oil of 

 Tartar 3 oteven Spirit of Urine would 

 precipitate the diflblved fubftan- 

 ces. 



And I have obferved^/^ that Salts 

 of a contrary nature will precipitate 

 bodies out of the fame Menftruum, 

 as not only Salt of Tartar^ but Sea- 

 falt being diflblved, will precipitate 

 each other, and each of them apart 

 will precipitate Silver out of dqua 

 fortis 5 and that eveo>where there is 

 a confeffed contrariety betwixt two 

 liquors,it may be fo ordered^that nei- 

 ther of them fiiall precipitate what 



is 



