Gelatin, Rough

Syn. Gelatine Brut , Fr. From the skulls of oxen, the spongy insides of the horns and ribs, and from several other soft bony parts (deprived of fat), by washing them in water, digesting in an equal weight of hydrochloric acid of 6° Baume, in cold weather, and 4° or 5° in summer, for 10 days, then in acid of only 1° Baume for 24 hours longer; afterwards soaking and washing in succe ive portions of cold water until all the acid is washed out, adding an ounce of carbonate of soda to the last water. Used to make glue, . A similar article is prepared from the bones of sheep. The pieces, after being treated as above, are steeped in boiling water for a few minutes, wiped dry, and shaken together in a bag to remove the internal pellicle; after which they are cut into squares or dice to disguise them, and finally dipped into a hot solution of gelatin to varnish them. In this state the article is called ‘ GELATINE BRUT FIN ,’ Used to make soup. It keeps better than the cakes of portable soup. When le carefully prepared, it is also used to make glue for fine work. See Bone gelatin .