17 
Part VI.] Preparation of Turpentine , Rosin and Gum. 
In the Bombay Presidency, the most suitable localities for such an 
industry will probably be found in the Shirpur Range of the North 
Khandesh Division, in the Chopda, Yaval and Raver Ranges of the 
East Khandesh and in Navapur Range of the West Khandesh Divisions. 
Though no definite information is available from the Hoshangabad 
Division of the Central Provinces, it is understood that supplies from that 
locality are considerable, and that the same may be said of Nimar and 
Nagpur-Wardha, though in those Divisions labour may be a difficulty. 
In Madras, the Conservator is of opinion that the trees are found in 
even greater quantities than is reported by the local officers. 
Part III.—Chemical Analysis. 
1. Chemistry of the gum-oleo-resin. 
This gum-oleo-resin has been known for a long time under the familiar 
name of olibanum. Its chemical composition has been the subject of 
detailed investigation in connection with several African species of 
Boswellia by Tschirch and Halbev. 1 Boswellia oil has been investigated 
by Stenhouse, Lowing, Kurbatow, Wallach Rheindorff, Walter and in 
the Laboratories of Messrs. Schimmel & Co.; the latter discovered the 
presence of Dipentene and Phellandrane. 2 
In addition to leevo pinene already found to constitute the main 
bulk of the oil, Boswellia resin consists of Boswellic acid C 32 H g2 0 4 , 
free and combined as an ester with oliban-resenes (C l4 H 22 C) s . 
The gum is stated to consist of arabic-acid, bassorin and a bitter 
principle. The following is the composition of the olibanum , as given 
by Tschirch 3 :— 
Per cent. 
Oleo-resin (including 0-5 per cent, undetermined 
bitter principle) extracted by 90 per cent, alcohol . 
72 
Gum ....••••• 
20 
Bassorin 
6-8 
Plant remains 
2-4 
‘A sample of the Indian Boswellia serrata gum-oleo-resin was examined 
at the Imperial Institute, London,- the report on which is given in the 
1 Uber das olibanum Arch. d. Pharm 1898 S. 487. Details in der Dissertation, Halbeys, 
Bern 1898. 
2 Die, Harze and die Harz behalter von A. Tschirch pp. 411 efc 41o. 
3 Tschirch loc. cit. and Dr. Karl Dietrich Analysis of Resins, Balsams and Gum-resins r 
-d. 328 ; also Southall’s Materia Medica by Barclay, p. 244. 
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