352 ODOROGRAPHIA. 
mately sinks to the bottom as a limpid brown oil which may be 
freed from adhering nitric and nitrous acid by distillation over 
strong potash-lye. It has a pungent odour and may be kept with- 
out alteration for any length of time, but is decomposed by dis- 
tillation. 
According to the researches of Voiry *, a sample of green oil of 
cajeput examined by him presented considerable analogy to oil of 
Eucalyptus globulus ; on fractional distillation two thirds passed 
over between 175° and 180° C. Below that temperature were 
obtained butyric, valerianic, and benzylic aldehydes, also a levo- 
gyre terpene, C,)Hy,, that formed a crystalline monohydrochlorate, 
After 180° the distillation was continued at reduced pressure, and 
there was separated, amongst other bodies, a small fraction of 
terpineol, C,)H,;. OH, identical with borneol, in the solid form. 
This body has since been obtained by Messrs. Schimmel (April, 
1892) from the fraction of cajeput oil boiling between 215° and 
220° C., by means of cooling in a refrigerating mixture of solid 
carbonic acid and ether. The terpineol thus obtained crystallizes 
at ordinary temperatures, its melting-point after several crystalli- 
zations being from 33° to 34° C. 
Melaleuca viridifoliat. Synonymous with M. leucodendron 
angustifolia, Lin, fil.t; Metrosideros quinquenervia, Cav.§; Metro- 
sideros coriacea, Poir.|| ; Metrosideros albida, Siebl.{| A native 
of New South Wales and New Caledonia; it attaims a height of 
20 feet and bears pale greenish flowers. The oil distilled from its 
leaves in New Caledonia is locally called Niawli. The physical 
properties of this oil do not appear to have been examined. 
The following Australian oils of cajeput are mentioned in 
Maiden’s ‘ Useful Native Plants of Australia,’ and samples of them 
were exhibited at the London Exhibition of 1862, but they do not 
appear to have any commercial demand in England :— 
Melaleuca decussata, R. Brown ; dark yellow; resembles cajeput 
in taste and odour ; yield, about 2 per cent.; sp. gr. 0°958 ; 
boiling-point 185°-209°. This shrub is only 3 to 6 feet 
in height ** ; it is found in Victoria and South Australia ; 
* Journ. Pharm. Chim. Aug, 1888, p. 149. 
+ Geertn, Fruct. i. p. 173, t. 35. t Suppl. 342. 
§ Icon. iv. t. 33. || Suppl. 1. p. 365. 
q Pl. exsic. Noy. Holl. p. 349. ** Ait. Hort. Kew. p. 415. 
