CONTENTS 
PAGB 
Introduction. 
Part I.—General. 
1. Records dealing with gum-oleo-resin of Boswdlia serrata • • • 2 
2. Uses as recorded in the past ......... 2 
3. Basis of enquiry ........... 2 
Part II.—Distribution, method of tapping, effect of tapping, 
cost of extraction and outturn. 
1. Distribution ............ 2 
2. Method of tapping— 
(i) Nimar Experiments"' ...... . 5 
(ii) Experiments in the Bombay Presidency .... 7 
(Hi) Tapping in Gwalior State . . . ... . 1 
3. (i) Effect of tapping on the tree ....... 12 
(ii) Conclusions based on' the tapping experiments .... 13 
4. Cost of extraction and outturn— 
(i) Cost of extraction ......... 14 
(ii) Outturn ............ 15 
Part III.—Chemical Analysis. 
1. Chemistry of the gum-oleo-resin ........ 17 
2. Preliminary analysis .......... 19 
3. Constants of Boswdlia serrata gum-oleo-resin— 
(i) Turpentine ...... ... 21 
(ii) Rosin ........... 22 
(Hi) Gum ........... 23 
Part IV.—Isolation of the three constituents of Boswellia 
serrata gum-oleo-resin. 
1. Preliminary remarks .......... 24 
2. Solvents ............ 25 
Part V*—Proposed plant, method of extraction and prepara¬ 
tion of the products for the market. 
1. Plant ...-...•«••••• 27 
:2. Method of extraction— 
(i) Solvent extraction followed by steam distillation ... 28 
(ii) Steam distillation followed by solvent extraction ... 29 
(Hi) Preparation of the products for the market— 
(a) Turpentine 30 
(b) Rosin ........... 30 
(c) Gum 30 
(d) Under-extracted gum ........ 30 
B2 
