400 Miscelhineom InteUigence. 



and filamentous like dense mucus ; finally, it became tenaceous, 

 hard, and less in bulk, having lost a principle which had been 

 dissolved out by the alcohol. 



Process to obtain the Gloiodine. — Procure gluten from wheat 

 in the ordinary way, place it immediately in alcohol of 35° 

 (S. g., 842,) or 40° (s.g.817), and work it about with a spatula ; 

 repeat this washing as long as the alcohol on trial becomes tur- 

 bid on the addition of water. The different portions of alcohol, 

 thus put together, are to be set aside in a close vessel. It will 

 gradually deposit a small portion of gluten on the glass, and 

 become transparent and slightly yellow. The clear solution, 

 when slowly evaporated, yields the gloiodine having the ap- 

 pearance of honey. It is still contaminated with a small por- 

 tion of a resinous substance which may be removed by sul- 

 phuric ether. 



Gloiodine may also be obtained from gluten, which has been 

 rapidly dried, and afterwards treated with hot alcohol ; or it 

 may be procured by digesting bruised seeds or wheaten flour in 

 alcohol in the heat of a stove ; but the first process is by much 

 the best when the substance is required pure. 



Properties of Gloiodine. — When dry it is of a straw yellow 

 colour, and when inthin pieces somewhat transparent; it is brittle, 

 lias a smell somewhat like a honey-comb, and when slightly 

 heated, the odour of apples. It becomes adhesive in the mouth, 

 and has a balsamic taste. It is considerably soluble in boiling 

 alcohol, but is deposited as the temperature diminishes. It 

 forms a kind of varnish on bodies to which it is applied. It 

 softens in cold water, but does not dissolve ; when the water is 

 V)oiled the gloiodine forms a scum on it, and the water becomes 

 turbid. It is heavier than water. The alcoholic solution of 

 gloiodine is rendered milky by water, and is precipitated by al- 

 kaline carbonates in white flocculi. It is scarcely rendered tur- 

 bid by the vegetable and mineral acids. Dry gloiodine dis- 

 solves in the caustic alkalies and in the acids. When heated, it 

 smells and burns like animal substance with a lively brilliant 

 flame, and leaves a light spongy coal, diflicult to incinerate ; 

 gloiodine, which appears in some points to resemble rrslnous 



