122 



smells faintly aromatic, tastes warming, bitter; fuses at 83°, subli- 

 mates partly undecomposed, partly yielding ammoniacal products ; is 

 almost insoluble in water, readily soluble in alcohol and etlier, not 

 in aqueous alkalies and diluted acids, is not decomposed by con- 

 centrated nitric, but by hydrochloric and concentrated sulphuric 

 acids. 



[Lobelacrill. Isolated by Enders from the herb of Lobelia inflata 

 hy exhausting the drug with alcohol and distilling the liquid in 

 presence of charcoal, which then retained the acrid principle. 

 The charcoal was washed with water and then treated with boiling 

 alcohol. This, on evaporation, yielded a green extract, which was 

 further purified by means of chloroform. Warty tufts were thus 

 finally obtained, yet always of a bro^vnish colour. The tufts are 

 readily soluble in ether and chloroform, but only slightly in 

 water; they possess the acrid taste of the herb. Lobelacrin is 

 decomposed by merely boiling with water; by the influence of 

 acids or alkalies it is resolved into sugar and Lobelie acid. The 

 latter is soluble both in water and alcohol, and is nonvolatile; it 

 yields a soluble salt with baryta, whereas the lead-salt is insoluble 

 in water.] 



Lolielill. Alkaloid-like substance of the stalks and leaves of 

 Lobelia inflata, said to act similarly to nicotin, but as yet only 

 obtained in the impure state, namely, by extracting with water, 

 acidulated with hydrochloric acid, evai)orating, treating the extract 

 with alcohol, and evaporating the tincture. — Shining yellow, gum- 

 mous, hygroscopic mass of an aci'id tobacco-like taste; dissolves 

 readily in water and in alcohol, not in ether; is precipitable by 

 tannic acid, bi-iodide of ^^otassium, iodide of potassio-mercuiy, 

 nitrate of silver, chloride of gold and chloride of platmum. 



Lupillill. Bitter substance of the seeds of Lupinus albus, and 

 probably of many other species. Di-aw out with hot alcohol, evapor- 

 ate the tinctures to dryness, treat the mass with water, digest the 

 aqueous sohition with charcoal and evaporate to the consistence of 

 a syrup, which throws do\vn the L. in small, white, amorphous 

 grains. — It is transparent, brittle like gum arabic, deliquesces at 

 the air, dissolves readily in water and in weak alcohol, not in 

 absolute alcohol and in ether, is not perceptibly altered by acids 

 and by alkalies. 



Lupulic Acid - C32 H25 O7. The bitter ingredient of hops 

 (Humulus Lupulus), in the j^urest state. Exhaiist with ether, 

 dLstil off the ether from . the extracts, treat the remaining thick 

 mass with cold alcohol of 90°/^, concentrate the alcoholic tinctiu'e, 

 dissolve the residue again in ether, shake this ethereous solution 

 repeatedly with strong potash-ley in order to remove resinous 

 bodies, shake then with water, which takes up mostly the bitter 



