257 



to the rctiuirements for pineiu-. The dextro-rotatory pinene occurring in the leaf 

 oils of the Callitris has reached a maximum in the oil of this species. 



The Oil of the Fruits. 

 This material consisted of the fruits alone, the leaves having been entirely 

 removed, and 56 lb. of fruits gave 2I oz. oil, equal to 0-3 per cent. The crude oil 

 was light coloured, very mobile, and in odour and appearance strongly resembled 

 the oil from the leaves. The constituents of the fruit oil were also in agreement 

 with those of the leaf oil. The specific gravity of the crude oil at 15° C. = 0-8663 ; 

 rotation a^ = +45-1°; refractive index at 19° C. = 1-4798 ; saponification 

 number 6-86, equal to 2-4 per cent, ester. From these results it is seen that the 

 oil obtained from the fruits of this species of Callitris is practically identical with 

 that obtained from the leaves. The tabulated results will show this more clearly :— 



Crude Oil from the Leaves of Callitris Drummondii. 



Locality and Date. 



Specific Gravity Rntatinn n Refractive 



o(, Rotation rr^ Inde.x ° C. Ester per cent. 



i 



Yield 

 1 per cent. 



West Australia, 

 26 '6 03 



0-8591 @ 17 



+ 42-2 1-4739 @ 19 



1-85 



0-547 



Crude Oil from the Fruits of Callitris Drummondii. 





Do. 



0-8663 @ 15 



+ 45-1 1-4798 @ 19 



2-4 



0-3 







IV. TIMBER. 







{a) Economic. 

 Very little appears to be known in regard to the uses of this tree. 



(b) Anatomy. 



The distinguishing characteristics of this timber are the medullary rays 

 which are generally only a few cells in height, and which are mostly empty of 

 the brown manganese content, this substance, however, occurs scattered throughout 

 the prosenchymatous tracheids of the xylem in the autumnal and spring woods, 

 and can be well seen in a transverse section. The pitted cells are numerous on 

 the radial walls of the tracheids. 



V. BARK. 



Only young bark was at our disposal for examination, and this called 

 for no special remarks, as its structure corresponded relatively to that of the 

 mature cortex of its congeners. 



R 



