BY .7. H. MAIDEN, F.L.S., F.CS., ETC. 3 



The percentage of arabin is exceedingly high — sufficient, 

 perhaps, to constitute this a gum-resin ; but as I was not aware 

 of a gum-resin being recorded tor the coniferte, I digested a 

 fresh sample of the resin in cold water, with the result that I 

 obtained 10*5 per cent, of arabin, a residue of a creamy white 

 colour being left. 



The only previous instance I can find of arabin being found 

 in a coniferous resin, is by Dulk (Morel, P]uinii. Jouni. [3] ix., 

 714), who finds 0-1 per cent, in White J) Simmsir (Dam nuira 

 orientiiUs, Lamb.) 



A. Cuinihu/hfimii resin melts at 97'2 degrees C. It contains 

 sugar, but neither this substance nor the ash was determined. 



ARAUCARIA BID WILLI (Hook.) 



B. Fl. vi., 248. 



" Bnnya-Bunya " of the aboriginals. Found in Queensland. 

 This specimen is as different from that produced by A. 

 Cunnmjhama as possible. It is not easily described. It is 

 rather brighter in colour than low-grade resin of XdntJidrrJuta 

 arhorea '■'•' ; otherwise, they are very similar in appearance. 

 Except in redness of colour it is much like some samples of 

 infei'ior gum benzoic I have seen. It has a creasote-like odour. 



* This particular resin and that of X. uvhorcn are so much alike that 

 the non-criiical observer would scarcely fail to confound them. The 

 following points serve to distinguish them : — 



1. The comparatively high solubility of the Antwarin in ))etroleum 



spirit. 



2. The large amount of accidental impurity in the Anitnaria. 



3. Examination of the residue left after treatment of the re.sins, first 



with petroleum spirit and then with alcohol. The Ariiiicirio 

 residue contains numbers of little scales, which are from the 

 male amenta. The XtnitliorrlKrir residue contains fragments of 

 the bases of its own leaves. 



4. The absence of benzoic acid in Araacarla. 



