116 H. G. SMITH. 



considered by my colleague, Mr. R. T. Baker, to be new to 

 science, and it is his intention to describe it before the 

 Linnean Society of this State. As the oil is similar in 

 constitution to those of the other species of Angophora, 

 it may be described here. 



Chemistry. — Tl is material was forwarded by the Museum 

 collector from Myall Creek, near Bingara, 370 miles north 

 of Sydney. It was cut as for commercial oil distillation. 



The average yield of oil was 0*13 per cent. The crude 

 oil was, in odour and appearance, identical with that of A. 

 Bakeri. The chief constituents were also identical with 

 those of that species, with the exception that the pinene 

 was present in greater quantity, and the ester in corres- 

 pondingly less amount. Phellandrene and cineol were, of 

 course, both absent. 



The crude oil had specific gravity at 15° C. = 0*8703 ; 

 rotation a D = + 36°.3; refractive index at 20° = 1*4669; 

 and was insoluble in 10 volumes 80 per cent, alcohol. 



On the rectification of 100 cc, the usual amount of acid 

 water and volatile aldehydes, together with the constituent 

 of pear-like odour, came over below 155° O. (corr.). Between 

 155 - 157°, 60 per cent, distilled, and between 157 - 165% 

 21 per cent, came over. These fractions gave the follow- 

 ing results : — 



Sp. gr. at 15° C. Rotation a B Ref. index at 17° C. 

 First fraction 0*8645 + 37°.9 1*4665 



Second fraction 0*8679 + 37°.3 1*4669 



These two mixed fractions were again rectified and the 

 large portion distilling at 156° separated. This bad specific 

 gravity at 15° = 0*8618 ; rotation a D + 38°. 1; and refractive 

 index at 18° = 1*4655. The nitrosochloride melted at the 

 same temperature as those from the pinenes of tbe other 

 species. The indications are, therefore, that over 80 per 



