BY JOSEPH LAUTERER, M.D. 45 



If it is suspected in any material, 10 grammes of this must 

 be boiled with 50 grammes of water and 40 grammes of a strong 

 gelatine solution must be added. The precipitated tannate of 

 gelatine is filtered off and the liquid has to be tested in the 

 Nessler bottle for the unaltered gallic aci^. 



The percentage of this, subtracted from the first result, 

 gives the amount of tannin contained in the material to be 

 assayed. Mango seeds, for instance, contain much more gallic 

 acid than tannin. As it is seldom necessary to go through this 

 process, my colorimetric method of determining tannin is the 

 quickest and cleanest hitherto devised. 



BUNYA BUNYA NUTS. 



By Dp. JOSEPH LAUTERER. 



[Read be/ore the Royal Society of Queensland, February 16, 1895.^ 



There are two species of the Order Coniferfe in Europe 

 which yield edible fruits, namely Pinus j^inea, from Greece and 

 Italy, and Pinus cemhra, from Tyrol and Switzerland. The nuts 

 of Pimis pinea are winged, those of Pirnis cemhra are triquetrus 

 and have no wing. Both contain 40 or more per cent, of a 

 fatty oil like that of the almonds. 



Our Bunya Bunya Pine [Araucaria Bidwilli) yields nuts 

 three times as large as those of the European pines. The cone 

 of Araucaria Bidwilli is larger than a man's head and weighs up 

 to fifteen pounds. It is very interesting for botanical morpho- 

 logy, as an examination of its scales solves at once a question 

 left unanswered by my old friend and teacher in botany. Pro- 



