GUMS, KESINS, AND OTHER VEGETABLE EXUDATIONS. 199 



Mr. W. Bauerlen, botanical collector, wrote to me as follows 

 concerning the collection of the resin (gum resin) of Araucaria 

 GunningJiamii on the Richmond River. 



"The resin of this pine exudes plentifully, and when fresh it is 

 much of the consistency and colour of cream, sometimes rather 

 thinner. It seems that it takes a considerable time to harden 

 when it becomes somewhat clear and yellow-looking. 



"I am told that the Pine has another resin the existence of 

 which is not generally known, and the resin has to be looked for 

 under the bark, where it collects in hard dark lumps, which in 

 appearance are certainly quite different from the usual resin, 

 though both substances may after all be the same. Mr. James 

 Black of Bexhill told me about the occurrence of this resin and 

 showed me two pieces, one of which on asking for it he pre- 

 sented to me; strange to say, several people of whom T made 

 enquiries respecting it, knew nothing of this hard dark resin. I 

 shall of course follow the matter up and endeavour to find the 

 resin in its natural state. 



"I was told that the resin (yellow) of the White Pine is used 

 medicinally in kidney complaints and is found very effective in 

 stricture and retention of urine. A gentleman says he finds it 

 gives great relief in very aggravated cases, when three or four 

 doses are usually sufficient. He dissolves the resin in alcohol and 

 gives from 20 to 30 drops in water as a dose." 



Araucaria Bidwilli, Hook., "Bunya Bunya." 



For an examination of the resin of this plant see Maiden (54). 

 I there stated that the exudation of this pine would probably be 

 found similar to that of A. Gunninghamii if collected under similar 

 conditons. 



The gum resins of Araucarias are also dealt with by Lauterer 

 (33), who gives analyses of the exudations of A. Bidivilli and 

 A. Gunninghamii. See also a special paper by Lauterer on 

 A. Bidwilli (32). 



