202 



It. T. BAKER AND H, G. SMITH. 



These results agree with those usually recognised for 

 "cajuput " oil, and do not agree with those obtained with 

 the oils of the supposed forms of Melaleuca leucadendron 

 growing in New South Wales and Southern Queensland, 

 showing that these latter trees are not identical with the 

 Melaleuca which supplies the well-known " cajuput " oil. 

 The above investigation was carried out for comparison, 

 (b) Melaleuca Maideni. 

 This tree which occurs in Northern New South Wales 

 and in Southern Queensland, is that known in Queensland 

 as M. leucadendron var. lancifolia, and the oil has been 

 distilled in small quantities from the leaves of this species 

 by Mr. Ingham of Brisbane ; a sample distilled by him was 

 analysed by Mr. R. O. Oowley, P.c.s., the results being 

 published in the "Chemist and Druggist" of 28th May, 1910. 

 We have investigated the oil of this tree from the follow- 

 ing localities, and three several times of the year. 



Port Macquarie, New South Wales, 30/11/1910. 



Casino, New South Wales, 27/12/1911. 



Port Macquarie, New South Wales, 15/1/1912. 



The oils from these three specimens agree very well in 

 general characters; this can be seen from the following table. 

 The material was cut as for commercial oil distillation. 



Crude Oils. 



Yield 

 per 

 cent. 



6p. gr. 



at 

 15° C. 



Cineol Solubility in 

 per Alcohol by 

 cent. | Weight. 



Rotation 



Sap, 



No. 



Refractive index. 



Port Macquarie 



(19L0) 

 Casino (1911) ... 

 Port Macquaiie 



(1912) 



1-79 



1-26 

 117 



0-9199 



0-9227 

 0-9234 



39 



26 

 31 



7 vols. 70% 



1 vol. 80% 

 1 vol. 80% 



-4°.2 



-0°.7 

 -1°.9 



3-8 



32 



5-1 



1-4744 at 23° 



1-4800 at 22° 

 1-4769 at 23° 



Mr. Cowley's figures for his sample of oil of this species 

 were:— Sp. gr. 0*922; Rot. a D = - 3°; ref. ind. 1*4623; 

 cineol 45 per cent. 



The crude oil of this species was but little coloured. As 

 the leaves were distilled from iron the oil was not green, 



