OCCURRENCE OF ALUMINIUM SUCCINATE IN TREES. 119 
present as sodium chloride. It is remarkable how small an 
amount of phosphates occur in the ash of this species. The 
same remark applies to the sulphates, but all the sulphates 
were soluble, while the phosphates were insoluble in water. 
It is evident that alumina does not care to combine in the 
plant with either sulphuric or phosphoric acids. The CO, 
appears to be combined with the lime and magnesia—the 
amount of carbonates was very small in the ash of the 
Queensland sample. As the amount of soluble alumina 
increases, so does the potash and in the same proportion, 
but it only occurs in combination with the alumina. If it 
were not so originally, then some of the potash would 
undoubtedly be burnt into carbonate, but this is not the 
case, and the result is strong evidence that the alumina 
occurs in the tree in solution as potassium aluminate. The 
following table will illustrate this :-— 
Locality of Tree. aiaerets eee Potash K,0O. 
Queensland specimen 72°18 7°43 6°98 
Mullimbimby _,, 23°71 12°33 10°91 
- Dorrigo > 26°47 16°56 14°96 
The alkalis were determined in the filtrate from the 
alumina by preparing in the usual way and titrating the 
total chlorides. The phosphoric acid was separated as 
molybdate, and the amount found subtracted from the 
alumina. 
As sufficient material has been obtained to allow of some 
for distribution, I am permitted to state that anyone 
interested in the physiological aspect of this question, can 
obtain a small specimen of the wood of the Queensland 
sample together with a portion of the aluminium succinate, 
by applying to the Curator of the Technological Museum, 
Sydney. Iam indebted to Mr. J. W. Tremain for the photo- 
graph of the log. 
