M 



substance, and precipitate this aqueous solution witli sulphate of 

 coppei*. The pi-ecipitate of fine, blue, microscopic needles, being a 

 combination of the bitter substance with oxide of copper, has to 

 be washed with a little ether. Dissolve in more ether, decompose 

 the solution with sulphuret of hydrogen, filter off from the sidphide 

 of copper and evaporate in a current of carbonic acid gas. The re- 

 maining brown, crystalline mass is freed from the adhering mother 

 liquor by means of nitro-benzol. -^Colourless, rhombic prisms of 

 great lustre, brittle and breaking imder a gentle pressure ; tasteless, 

 but of a pure and pleasant bitter, when dissolved in alcohol; 

 insoluble in water, most readily soluble in alcohol, ether, chloro- 

 form, sulphide of carbon, benzol, oil of turpentine, &c. ; of a de- 

 cidedly acid reaction. 



[Llipillin. A liquid, volatile alkaloid contained, besides Tri- 

 methylamin, in hops. It has. the odour of Coniin, and assumes a 

 violet hue when treated with Chromate of potash and sulphuric 

 acid. — Griessmayer.] 



Luteolill = C24 Hs Oio. Yellow pigment of weld (Reseda 

 luteola). Draw out the herb with alcohol of 80°/^, evaporate the 

 tinctures, collect the L. formed on keeping and dry, wash 

 with a little cold ether, dissolve in alcohol, pour the solution into 

 water, heat to the boiling point, filter, and let crystallise. — 

 Pure yellow, silky needles, inodorous, of a slightly bitter and 

 acrid taste, and of acidulous reaction ; fuse above 320° imder 

 partial decomposition; dissolve in 14,000 parts cold and in 5000 

 parts boiling water, in 377 parts alcohol, and in 625 parts ether, 

 readily in warm concentrated acetic acid. 



Lycoctonill. Peculiar alkaloid of the root of Aconitum Lycoc- 

 tonum. Its preparation is partly given under " Acolyctin." Tlie 

 ether, employed for the purification of acolyctin, and containing 

 Lycoctonin, is allowed to evaporate, the opaque white, usually 

 warty, crystals obtained are washed with ether, and afterwards 

 with cold water and dried. — It tastes strongly bitter, has an 

 alkaline reaction, dissolves readily in alcohol, less readily in ether, 

 slightly in water; the alcoholic solution does not become turbid 

 with ether, and scarcely so with water. Concentrated sulphuric 

 acid colours it yellow. In several of its properties it shows a 

 similarity with narcotin, but is distingiiished by its ready 

 solubility in alcohol, oy its decided alkalinity and by the form of 

 its crystals. The neutral sulphates and the hydrochlorids of L. 

 are precipitated white by tannic acid. 



Lycopodiimi Bitter. Found in Lycopodium Chamfecyparis- 

 sias. Prepare, according to Boedeker and Kamp, from the herb at 

 first an alcoholic, afterwards from the remnant an aqueous extract, 

 precipitate the aqueous sohition of the latter with acetate and 



