92 



beaiiLiful blue-violet colour, which passes to a dark peach-flower 

 red on addition of water, and yields an indigo -blue precipitate 

 with ammonia. It neutralises the acids, and forms white salts of 

 a burning, aciid taste, precipitable by ammonia with white colour. 



GlailCOpicrill. Alkaloid of the root of Glaucium luteum, 

 besides Clielerythrin. Exhaust with water containing acetic acid, 

 precipitate the clielerythrin by means of ammonia, saturate the 

 filtered liquid with acetic acid, precipitate with tannic acid, 

 triturate the washed deposit with hydrate of lime and alcohol, 

 warm, siibject the filtrate to carbonic acid, distil ofi" the alcohol, 

 filter, evaporate the liquor, and exhaust the remainder with ether. 

 The residue left after the evaporation of the ether, yields by 

 washing with water and a little ether, a comparatively pure pro- 

 duct, which has to be crystallised in hot water, while impure Gl. is 

 dissolved by the ether. Dissolve the latter after the evaporation 

 of the ether, in water and acetic acid mixed with subacetate of lead, 

 and adduce sulphuret of hydrogen. Filter off the sulphide of 

 lead, withdraw from it by repeatedly boiling with water and 

 acetic acid the Gl. mixed up with it, saturate these solutions and 

 the liquid filtered ofi' from the sulphide of lead with sulphate of 

 soda, and precipitate with ammonia. The precijiitate may be 

 obtained in the pvire state, but with difliculty, by dissolving 

 in ether, and evaporating the latter. Another alkaloid, pre- 

 cipitable by tannin together with Gl., remains with the almost 

 pure Gl. in small quantity; it forms a salt which crystallises in 

 needles, but soon eöloresces. — Snow-white, permanent grains, 

 bitter; dissolves readily in water, especially hot, and covers the 

 concentrated solution with a pellicle on cooling, which soon 

 becomes crystalline and sinks to the bottom ; dissolves in alcohol, 

 not so well in ether, yields neutral white salts of a bitter and 

 nauseous taste. 



Gliadin. See Gluten. 



Globlllai'ia Kesill = C40 H36 Oie. The fragrant resin of the 

 leaves of Globularia Alypum. From the alcoholic extract of 

 the leaves the bitter substance (Globularin) is extracted by water, 

 while Globularia Kesin remains. Dissolve the latter in alcohol, 

 digest with animal charcoal, and precipitate the filtered solution 

 with water. Olive-green, translucid, })lastic mass, of the smell of 

 the leaves. 



Glolmlarill^Cßo H44 Oos- The bitter ingredient of the leaves 

 of Globularia Alypum. The alcoholic extract is to be distilled, 

 the remnant dissolved in water, digested hot with oxyd of lead for 

 a considerable time, filtered, the liquid evaporated on the water- 

 bath, the remnant freed from a yellow ])igment by ether, dissolved 

 in water, pi-ecipitated with tannin, the ileposit dissolved in 



