278 ODOROGRAPHIA. 
observed *, By fractional distillation a terpene, known as olibene, 
boiling at 156°-158° and sp. gr. 0°862 at 12°, is obtained, together 
with a small quantity of an oxidized substance boiling above 175° 
and not yielding a hydrocarbon when treated with sodium. 
Olibene is identical with pinene ; it is soluble in alcohol and ether, 
and is resinified by nitric acid; it absorbs 1 molecule of hydrogen 
chloride, giving on standing a crystalline camphor-like body, 
C,)H,,HCl, which melts at 127°. 
The resin, exhausted as above by alcohol, melts rapidly and 
yields by dry distillation traces of an organic acid, and an oil 
which boils above 860°, and contains less oxygen than the resin 
itself +. 
The Boswellia serrata (B. glabra), Roxburgh {, synonymous 
with B. thurifera, Colebrooke §, above referred to as being a 
native of mountainous parts of India, and producing a gum-resin 
consumed there, is figured by Roxburgh || and described by Royle 
as found at Oude and Rohileund; also at Behar by Hooker, and 
at Kattyawar by Birdwood. Colebrooke found it between Séne 
and Nagpur, on the route by which he travelled to Berar. | 
The natives of India recognize the two varieties of this plant, 
foliola ovato-oblonga and foliola lineari-lanceolata, of which Rox- 
burgh made two species, and distinguish between their gum-resins. 
Birdwood remarks that from his observations the gum-resin has 
been either stalactiform, like the runnings of a wax candle, or in 
small tears, and always so soft that when kept im a bottle, in a 
short time, it ran into an oleo-resinous mass, with the smell of 
frankincense, but more turpentiny. He adds that he often tried to 
get regular tears of olibanum from this plant, but never succeeded 
‘in getting anything else than soft, oleo-resinous “ runnings ” from 
it, which even after months’ exposure on the trunk still remained 
quite soft. In Khandeish the olibanum produced by this plant is 
sold under the name of Dup-Salai (7.e. incense of Salai) in the 
village bazaars. 
As regards the “ Lubin Meyeti” above-mentioned, it has been 
proved to be the produce of astrongly marked species of Boswellia, 
* Ann. Ch. Pharm. xxxyv. p. 306. 
+ Kurbatow, Zeitsch. f. Chem. [2] vii. p. 201. 
{ Flor. Ind. ii. p. 883. 
§ ‘ Asiatic Researches,’ ix. p. 377, tab. 5. 
|| Cor. ii. tab. 207. 
