*206 B. T. BAKER AND H. G. SMITH. 



The cineol was determined by the resorcinol method in 

 the portion distilling below 260° O. (15 per cent.) of the 

 Gosford sample, but when calculated for the crude oil 

 showed that not more than 5 per cent, of that constituent 

 was present. The reactions for cineol were readily obtained 

 in this portion of the oil. With the other samples (Rose 

 Bay and Terrigal) a smaller amount distilled below 265°. 

 The other constituents in the oil do not appear to be 

 absorbed by resorcinol, and not more than 2 per cent, of 

 cineol in the Terrigal and less than that in the Rose Bay 

 oil was determined to be present by this method. That 

 a, little cineol was present was shown by the first portion 

 giving the reaction for that substance with bromine. The 

 terpenes were a little more pronounced in the Gosford 

 sample, and this may perhaps be accounted for by the distil- 

 lation of the leaves not having been carried so far as with 

 the others, this is suggested also by the lesser yield of oil. 

 The aldehydes obtained in the first portions distilling always 

 contained a substance with the odour of benzaldehyde, and 

 to endeavour to locate this, a portion of the crude oil was 

 frequently agitated during two days, with a solution of 

 acid sodium sulphite. A very small amount of a crystalline 

 substance separated, which was collected with difficulty. 

 When decomposed with soda a marked odour of benzalde- 

 hyde was obtained, but the amount available was too small 

 to proceed further. It may be assumed, however, that 

 benzaldehyde is the aldehyde having this odour occurring 

 in the oil of this Melaleuca. The small amount of terpenes 

 in the oil of this species consists of laevo-rotatory pinene, 

 lsevo-rotatory limonene and dipentene, thus agreeing in 

 this respect with those found in the oil of M. Maideni. They 

 were both determined in the oil of the Gosford sample. 



The sesquiterpene alcohol. The principal constituent 

 in the oil of this species is a liquid sesquiterpene alcohol, 

 which, from its physical characters and properties, appears 



