t*) 



a purpofe. I faw indeed, that diver s 

 of the Chymifts had by a diligent 

 and laudable employment of their 

 pains and induftry , obtain d divers 

 Produ&ions, and lighted on feveral 

 Phenomena confiderable in their 

 kind 5 and indeed more numerous, 

 than^ the narrownefs and fterility of 

 their Principles corifiderd^ could 

 well be expe&ed. But I obferved 

 too, that the generality of rhofe>hat 

 bufie themfelves about Chymical O- 

 perations 5 fome becaufe they pra- 

 ftife Phyfick} and others becaufe 

 they either much wanted, or gree- 

 dily coveted money, aimed in their 

 Trials but at the Preparation of 

 good Medicines for the humane bo- 

 dy, or to difcover the ways of cu- 

 ring the Difeafes or Imperfections of 

 Metals, without referring their Tri- 

 als to the advancement of Natural 

 Philofophy in general 3 of which 

 moft'of the Alchymifts feem to have 

 been fo incurious, that not onely 

 they did not inftitute Experiments 



for 



