114 



Iva oil, achillein, and moschatin. The alcoholic extract of the 

 plant is mixed with acetate of lead, filtered, the filtrate treated 

 with siilphuret of hydrogen, filtered and evaporated. The brown 

 residue is freed from achillein and moschatin by means of acetic 

 acid, which leaves behind the Ivain. — The I. is yellow, of the 

 consistence of turpentine, easily soluble in alcohol, and of an 

 intensely bitter taste.] 



Ivy Kesili. Exudation of the stem of Hedera Helix. Red- 

 brown or greenish, transparent, brittle mass, of a faint aromatic 

 smell, and likewise acrid taste. Contains about 23% resin, 7°/^ 

 gum, and many impurities. 



Jalaj)ill=:C68 H56 O32. In the tubers of Ipomoea Orizabensis 

 and Convolvulus Scammonia. The crude resin is obtained by 

 extracting with alcohol, mixing with water, distilling off the 

 alcohol and drying the remaining mass. Dissolve this in much 

 alcohol, mix the solution with water imtil tui'bid, boil the mixture 

 repeatedly with animal charcoal, precipitate the filtrate, coloui-ed 

 still, with acetate of lead and a little ammonia, which forms a 

 small cpiantity of a green-brown deposit; filter, free the liquid by 

 means of sul])huret of hydrogen, heating and subsecpient filtering 

 from lead; distil off the alcohol, knead the remaining resin re- 

 l)eatedly in hot water, dissolve in ether and evaporate. — Colourless, 

 transparent in thin layers, amorphous, brittle, even at 100°, softens 

 at 123°, fuses at 150°; inodorous, tasteless, has a scarcely per- 

 ceptible acid reaction when dissolved in water; dissolves very little 

 in water, most readily in wood sjjirit, alcohol, ether, chloroform, 

 acetic acid, benzol, oil of tui-pentine, in cold concentrated sul})hui-ic 

 acid with a beautiful red colour, changing into bi'own-black under 

 formation of sugar ; splits, when heated with diluted acids, into 

 sugar and jalajiinol, zrC^o H31 O7, a white mass, shaped like the 

 particles of cauliflower. [Is, according to Flueckiger and Hanbury, 

 identical with Convolvulin]. 



Jamcliciu= Berberin. 



Japanese Wax. Obtained from the leaves, branches, and fruits 

 of Rhus succedanea by boiling with water. — Yellowish-white, 

 smells and tastes a little acrid, and affects the throat; 

 softer and mox'e unctuous than beeswax, also more friable ; has au 

 acid reaction, fuses at 45°, contains palmitin but no olein; is, 

 according to Berthelot, perhaps di-palmitin. 



Jervm = CGo H45 ISr2 O5. Alkaloid besides veratrin of the 

 root of Yeratrum album. Ti'eat the alcoholic extract with water 

 acidulated with hydrochloric acid, precipitate the solution with 

 carbonate of soda, dissolve the deposit in alcohol, digest with 

 charcoal, distil ofi" the alcohol, press the crystalline residue in 

 order to remove most of the difificultly crystallisable veratrin, and 



