91 



there remains a honey-yellow, transparent, veiy hygroscopic mass 

 of very bitter taste, readily soluble in water and aqueous alcohol, 

 not in ether and absolute alcohol, not precipitable by metallic 

 salts. 



Getall Lalioe. The milky juice of Ficus subracemosa and F. 

 variegata, hardened at the air, has in appearance some similarity 

 with crude gutta-percha, is outside of a blackish-grey, inside of a 

 delicate pink colour, very porous, brittle, becomes by continued 

 rubbing soft and plastic like wax, is easily lighted and burns with 

 a white, smoking flame, becomes sticky at 35°, liquid at 75°, floats 

 on water, is not soluble in cold alcohol, dissolves in hot alcohol, 

 leaving undissolved a brownish, very viscid mass ; the brown 

 solution, on cooling, throws down most of the dissolved substances 

 xmder the form of a white granular powder. Ether, chloroform, 

 benzol, and oil of turpentine dissolve the G. at ordinary tempera- 

 ture, with the exception of the said Ijrownish mass. Caustic 

 alkalies affect it only after continued boiling, while dissolving the 

 brownish mass and leaving the G. white. The G. may conse- 

 quently be regarded as a kind of wax. 



Gill«-koic Aci(l=C48 H47 O3 + HO. Peculiar, solid fat- 

 acid of the fruit of Gingko biloba, is obtained by extracting with 

 ether, evaporating the solution and cooling the remaining fat 

 down to 0°, when the acid will crystallise in concentrically 

 radiated needles of yellow colour. It dissolves readily in alcohol 

 and in ether, is of strongly acid reaction, fuses at 35°. The ging- 

 koate of lead is viscid, that of baryta sparingly soluble in water, 

 readily soluble in alcohol ; the gingkoate of silver is insoluble in 

 alcohol. 



Olaiicill. Alkaloid, contained in the herb of Glaucium luteum, 

 not in the root. Bruise the herb with acetic acid, press, boil the 

 liquid, strain, add a little nitric acid and precipitate warm with 

 nitrate of lead. After cooling, filter off" the fumarate of lead 

 deposit, remove from the liquid excess of lead by sulphuret of 

 hydrogen, neutralise the filtrate and precipitate with tannic acid. 

 Mix the washed and pressed deposit moist intimately with hydrate 

 of lime, exhaust the mixture with alcohol, impregnate the filtered 

 liquid with carbonic acid, evaporate, wash the remnant with a 

 little cold water, in order to remove dyeing matter, and crystallise 

 the remaining Glaucin in hot water. — White crusts consisting of 

 minute scales of pearly lustre, separates from ether as a turpentine- 

 like, at first almost oily mass, which hardens by keeping, fuses 

 under water to an oil, is destroyed in higher temperatiu'es, tastes 

 bitter and very acrid, has an alkaline reaction, reddens at the air 

 and more rapidly in the sunlight, dissolves in water, better when 

 hot, most readily in alcohol and ether, assumes, when heated with 

 concentrated sulphuric acid — until the acid begins to evaporate, a 



