26 Sfmpaferttonoft^e^pmta^ 



world. And whar I fay to thofe 

 Chymifts, that make the fulphureous 

 Ingredient the caufe of fufibility^may 

 eafily, mutatis tnutandi* y be applied 

 to their Hypothefis, that rather af- 

 cribe that quality to the Mercurial ot 

 the Saline Principle^ and confequent- 

 ly cannot give a rational account of 

 the fufibility of Sulphur. And there- 

 fore though I readily allow (as I fhall 

 have afterwards occafion to declare) 

 that Sulphur, or an other of the tria 

 prima, may be met with^ and even a- 

 bound^ in feveral bodies endowed 

 with the quality that is attributed to 

 their participation of that Principles 

 yet that this may be no certain fign 

 that the proposed Quality muft flow 

 from that Ingredient^ you may per- 

 haps be aflifted to difcern by this il- 

 luftration, That if Tin be duly mixt 

 with Copper or Gold, or, as I have 

 tried, with Silver or Iron,it will make 

 them very brittle 3 and it is alfo an 

 Ingredient of divers other bodies that 

 are like wife brittle, as blew, green, 

 white^and otherwise colour'djAmels* 



which 



