AUSTRALIAN MELALEUCAS AND THEIR ESSENTIAL OILS. 209 



by the presence of a small amount of aldehydes, probably 

 butaldehyde or valeraldehyde. 



The specific gravity of the oil of this species is very low 

 for a Melaleuca oil, and it contains much dextro-pinene. 

 The presence of this terpene in quantity in the Melaleuca 

 oils does not necessarily, therefore, indicate the sophistica- 

 tion of a Melaleuca oil with turpentine when it is of low 

 specific gravity. Oineol was the other principal constituent 

 present. The oil contained only a comparatively small 

 amount of high boiling constituents, and 92°/° distilled below 

 183° 0. The principal high boiling constituent was a sesqui- 

 terpene, which corresponded in its reactions to that 

 occurring in the oil of certain Bucalypts. Only a small 

 amount of esters was present. The crude oil had a low 

 refractive index. It was insoluble in ten volumes of 70°/° 

 alcohol by weight, but soluble in one volume 80°/°. The first 

 fraction was also insoluble in ten volumes 70°/° alcohol. No 

 crystalline constituent was detected in the oil of this 

 species, nor does phellandrene occur in it. 



The crude oil had a specific gravity 0*8984 at 15° C, a 

 refractive index 1*4689 at 18° O., and a rotation in 100 mm. 

 tube a D +11*6°. On rectification 62°/° distilled between 158 

 - 172° O., (cor.). This fraction had specific gravity 0*8917; 

 refractive index 1*4686; rotation a D + 14°. Between 172 

 -183° 0., 28* distilled; this had specific gravity 0*9022; 

 refractive index 1*4689; rotation a D + 6*5°. Between 183 

 -245° O. 5°/> distilled; this had specific gravity 0*9161; 

 refractive index 1*4741. By the phosphoric acid method 

 the crude oil contained 33°/° cineol; the second fraction 

 contained 48°/° cineol. The saponification number for the 

 esters was 7*24. 



The first fraction was again distilled and the portion 

 boiling between 155-160° O. collected apart. This was 

 again distilled, and 11 cc. (representing 11°/° of the original 



N— Dee. 4, 1907. 



