and pjoDuctton of (Holattlttp* 3 * 



elevated, you may eafiiy find by put- 

 tirtg a grain or two of that reddiQi 

 Subftance into a ftrong infufion of 

 Galls, which will thereby immediate- 

 ly acquire an inky coloijr. 



Steel alfo, which, to deferve that 

 name, muft have endured extraordi- 

 nary violences of the fire, and grea- 

 ter than is needfull to obtain other 

 metalls from their Mother Earth > 

 Steel it felf, I fay, being reduced to 

 filings, and diligently ground with a- 

 bout an equal weight of Sal Armo- 

 niac, will, if degrees of fire be skil- 

 fully adminiftred , (for 'tis eafie to 

 err in that point,) without any pre- 

 vious calcination or redu&ion to a 

 Croats^ fuffer fo much of the metall 

 to be carried up, as will give the Sal 

 Armoniaca notable colour, and an 

 ironifh taft. 



And here it will be proper to ob- 

 ferve, for the fake of pradical Chy- 

 mifts, that the Quantity or Propor- 

 tion of the Volatile additament is to 

 be regarded 3 though not fo much as 

 its Nature, yet more than it is wont 



to 



