Boswel'lia Carte'rii, Olibanum, Frankincense. -- E. Africa, S. Arabia. This gum-resin exudes from incisions made in the bark; occurs in yellowish-brown tears covered with white dust; odor balsamic, terebinthinate; taste balsamic, bitter; partly soluble in alcohol; yields with water milk-white emulsion; contains volatile oil 4-7 p.c. (mostly olibene, CH), resin 56-72 p.c., gum (resembles arabin) 30 p.c., bitter principle, ash 3. p.c.  Stimulant, expectorant, Dose, gr 15-30 (1-2 Gm.), in emulsion, plaster, or fumigation.