CARMINE AND COCHINEAL STAINS. 151 



up with the salts, add the alcohol and acid, heat to boiling-point, leave 

 to cool, leave for some days standing with frequent agitation, filter. 



Use as the old tincture, the objects being prepared and washed out 

 with 50 per cent, alcohol. Mayer only recommends it as a succedaneum 

 of paracarmine. 



Since this fluid contains in itself all the necessary salts ( 212), it 

 gives good results with all classes of objects. 



