Dextrine. Gum Starch. C12H9O9,HO. Is obtained from Starch in three ways: 1, by carefully heating it to about 300°; 2, by the action of diastase; and 3, by heating Starch paste with Water acidulated with Sulphuric or very dilute Nitric Acid (1,000 parts of Potato Starch are moistened with 300 parts of Water, to which 2 parts of Nitric Acid hare been added, and dried in a stove heated to 240°). In many of its properties it closely resembles Gum.

Med. Prop. and Therap. Use*. To form an immovable apparatus for fractures and diseases of the joints, moisten 100 parts of Dextrine with Spirit of Camphor, and add 40 parts of water. It should be of the consistence of molasses. The bandages should be soaked in this mixture, and applied in the usual manner. It is stated to be very superior to the ordinary starched or gummed bandage.

As a demulcent drink, it is much employed in France as a substitute for Gum.