SECT. XV. RESINS. 437 



Botany Bay resin. The resin designated by 

 this name is said to be the produce of the Acarois 

 resinifera, a native of New Holland, but found in 

 great abundance about Botany Bay. It was first 

 brought to London about 1799- It is described in 

 Governor Philips's Voyage, and in White's Journal 

 of a Voyage to New South Wales. 



Green resin. This resin constitutes the colour- 

 ing matter of the leaves of trees and of almost all 

 vegetables. It is insoluble in water, but soluble 

 in alcohol. When treated with oxymuriatic acid 

 it assumes the colour of a withered leaf, and exhibits 

 the resinous properties more distinctly.* 



Copal. This resin is the produce of the Rhus 

 copallinum, a tree which is found in North America. 

 It is a transparent substance, with a slight tinge of 

 brown. It possesses the general properties of other 

 resins, but differs from them in not being soluble 

 in alcohol or oil of turpentine, without peculiar ma- 

 nagement. When dissolved in any volatile liquid 

 and spread thin upon wood, metal, or paper, so that 

 the volatile menstruum may evaporate, it forms 

 one of the most perfect and most beautiful of all 

 varnishes, known by the name of Copal varnish. 

 For this purpose it is generally dissolved in oil of 

 turpentine. 



Animi. This resin is obtained from the Hy- 

 Coubaril, or Locust-tree, a native of North 



* Thomson's Chemistry, vol. iv. p. 318. 



