230 



ORGANIC COMPOUNDS. 



DERIVED CHIEFLY FROM THE ANIMAL KINGDOM. 



638. ALBUMEN. (Albumin.} 



a. Prepared from serum of blood. 

 &. Prepared from eggs. 



Note. Specimen b has the property, when in the liquid state, of 

 giving a precipitate when shaken with ether. 



c. Vegetable albumen. 



639. PROTEIN. (Potassium Albuminate.) 



a. Whitish sandy powder. 



640. CASEIN. (Alkali Albuminate.^ 



a. Obtained from milk. 



641. FIBRIN. 



a. Animal fibrin, obtained from fresh blood by stirring it. 



b. Vegetable fibrin, obtained from oatmeal. 



642. ILEMATIN. C 96 H 102 N 12 Fe 3 18 . 



a. Blackish extractiform substance. 



643. PEPSIN. 



a. Prepared from the stomach of the calf. 

 6. Prepared from the stomach of the pig. 



Note. Specimen a is a mixture of pepsin and starch such as is 

 usually met with in commerce. 



644. GELATIN. 



a. Obtained from calves' feet. 



b. Grenatin. 



c. Vegetable gelatin. (Gliadin, Gluten.) 



d. Ditto, prepared from seaweed in Japan. (Gelose.) 

 Note. Specimen c was obtained from wheat gluten by treatment with 



boiling alcohol. For various lands of natural gelatin, see Collection o 

 Animal Materia Medica, p. 259, No. 800 to 817. For gelose, see P. J. (2) 

 vol. i. p. 470 ; Hanbury, Science Papers, p. 207. 



645. GLYCOCINE. (Glycocoll.) 



a. White powder. 

 Note. Obtained by the action of concentrated sulphuric acid on gelatin. 



646. LEUCINE. (Caseous Oxide, Amidocaproic Acid, Aposepediue.) 



a. White shining scales. 



Note. Obtained by the action of boiling solution of potassium 

 hydrate on gelatin. (Glycocine and leucine partly on account of their 

 being derived from gelatine, and partly because of their anomalous nature, 

 being capable of acting either as acids or bases, are more conveniently 

 placed among the animal organic compounds than elsewhere. See Fownet, 

 Chemistry, pp. 895, 896.) 



