Tor thofe qualities that affe& the fenfes vary of- 

 ten in one and the ftme thing : The Apple in the be- 

 ginning that is without fmell, of fowr tafte, green 

 colour, hard to the touch, {hall in a little fpace be 

 fragrant to the Nofe, fvvcet to the Palat , of a gol- 

 den or ruddy colour^ and foft to the feeling : And in, 

 a thoufaniinftances 'tis found, that feveral pofitures 

 of the fame parts,, fhall produce feveral oppofite co^ 

 lours, and orher fenfible appearances in the fame 

 thing : There is no inherent colour, either in the 

 infuiionof Galls or Vitriol (though limpid they are 

 not) fo dark or deep as to come near the blacknefs o£ 

 Inck, which notAithftanding, being mixt, they pro- 

 duce it.Two other infufions of like colour,would not 

 upon mixture arifc to fuch an effe£l, becaufe not able 

 todifpofe each odiers particles into fuch pofitures. 

 Spirit of Vitriol, though vvithout colour, di-fpofes 

 the parts of this Inck foas to deftroy the blacknefs; 

 Oyl of Tartar reftores both pofition of parts and pri- 

 fline colour;and that it arifes from different pofitures^ 

 may be argued, becaufe there is a vifible motion,ftri- 

 ving, and local mutation in them, before thefe laft 

 effecls are produced ; and 'tis plain, that when the 

 Jnck,by reafon of the fpirit of Vitriol,difappeared;,yet 

 all the parts were there, for elfe k will not be ima- 

 ginable ho v a limpid Liquor,as Oyl of Tartar, fhould 

 reduce the colours which it does not by it felf gene- 

 rate, as it is plain, becaufe reftoring Letters writ- 

 ten with Inck, and taken off with Spirit of Vitriol , 

 it makes no blacknefs on the Paper, fave onely upon 

 the Lines of the Letters : Thefe two limpid Li- 

 quors likevife, being put together, turn into a good 

 coniiilence and milky colour. 



Lui 



