tocoftbenefe antj <£o?ro0fttlttp* $9 



not onely is not foluble in water 

 but which neither Aqua Forth no 

 Aqua Regit) though fometimes they 

 will colour themfelves upon it 5 are 

 able ( as far as I have tried ) to 

 make Solutions of. We fee like- 

 wife, that fimple water will,, being 

 boifd for a competent time with 

 Harts-horn^ diifolve it and make a 

 Jelly of it : And yet, when we have 

 taken Harts-horn throughly calcind 

 to whitenefs not onely we found 

 that common water was no longer a 

 fit Solvent for it , but we obferved 3 

 that when we put Oyl of Vitriol it 

 felf upon it 5 a good part of the 

 white powder was even by that 

 Corrofive Menftruum left undif* 

 folved* 



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