Tragacanth, 1; gum acacia, 1; starch, 1; refined sugar, 3.

Uses. - It is used to suspend heavy powders, such as sub-nitrate of bismuth, and is more efficacious than gum-arabic owing to the insoluble gum bassorin, which swells up when water is added. Also used in making lozenges, and emulsions of cod-liver oil.