ti NOTES ON THE RESIN'S, ETC., OF ARAUCAPJA. 



the pleasing odour of canada balsam, with perhaps a dash of 

 creasote thrown in. In the mouth it has a slight aromatic 

 flavour, readily softens, first feels sticky like dough, and then 

 like paraffin. Cold water simply whitens the resin. Hot water 

 seems scarcely to effect any change in it, although the liquid 

 becomes slightly cloudy. In rectified spirit the greater part 

 •quickly dissolves, forming a pale yellow or almost colourless 

 liquid. The residue is white and granular. Petroleum spirit 

 extracts 52-7 per cent., consisting of a yellowish resin, a little 

 volatile oil (turpentine), and a little wax. The residue was then 

 treated with alcohol, which extracted 27'3 per cent, of a 

 yellowish resin. The residue was then acted upon with water, 

 Avhich extracted 15*6 per cent, (arabin, 10-3 %, saline matters, 

 5'3 %). The remainder consisted of metarabic acid (1 %), and 

 accidental impurity (3-2 %). 



U'J-.S 



As showing that this resin is somewhat variable in 

 •composition, a further sample was digested in, alcohol direct, 

 which dissolved 80-5 per cent. The residue consisted of white 

 opaque particles, which were (hgested in water, which dissolved 

 9"7 per cent, (proved to be arabin, 8-3 per cent., and salts, 1-4 

 per cent.) ; while the remainder (9'8 per cent.) was soluble in 

 petroleum spirit, with the exception of a little accidental 

 impurity and metarabic acid, and proved to be a white waxy 

 substance, which was not further examined. 



Sl'.mmary. 



Eesin soluble in alcohol . . . . . . sQ-o 



Waxy substance soluble in petroleum spirit 'J-O 

 Metarabic acid . . . . . . . . Q-K 



1 , 1 1 1 • i ' arabin . . . . . . s-H 



Soluble m water ,^ , , 



I salts 1-4 



100-0 



