ANALYSIS OF SC AMMO NY. 3J3 



The alcoliolic solution was evaporated to a sirivpy 

 consibtence. Cold water precipitated from it a vesiu, 

 which formed a homogeneous mass. The supernatant li- 

 quor was clear and colourless. Evaporated to dryness a 

 brown matter was obtained, soluble both in water and in 

 alcohol, and precipitable by acetate of lead. This sub- 

 etanre appeared to be what is called extract. When dried 

 it weighed 2 parts. 



The resinous mass, separated and dried, was yellow, and 

 weighed 6'0. 



The 26 parts insoluble in alcohol were then treated with 

 boiling water. After evaporation a glutinous matter re- 

 mained, weighing 3 parts, and having all the characters of 

 gum. The remainder consisted of fibres of vegetables and 

 a little silex. 



The distillation of Aleijpo scammony exhibited nothing Subjected to 

 , , , , , . , , ,• dry distiUatio;-:. 



Temarkable, Its products were a very acid brown liquor, 



ond a light, blackish oil. The coal was black, shining, and 



compact. It contained the carbonates of potash and lime, 



aluraine, silex, and a little iron. 



Examination of Smyrna scanimony. Smyrna scam- 



The fusion of Smyrna scammony is less com})lete than [^Jg'^^ 

 thnt of Aleppo. Instead cf concreting into a lump with -prg^tp^ .^,1^1^ 

 boiling water, it becomes clotty ; but the water poured oif water, 

 has similar qualities. 



An equal portion of this scammony, exhausted by boiling 3nd with alco- 

 alcohol, afforded a tincture of a deeper colour, though con- '"* ' 

 taining less resin. By evaporation a brownish, transparent 

 resin was obtained, weighing 28 parts. The matter inso- 

 luble in alcohol weighed C6. This residuum, treated with Regifinurn 

 boiling water, coloured it yellow. The solution had a faint boded in 

 sweetish taste ; and alcohol produced in it a flocculent pre- '^''^^^^' 

 cipitate soluble in water. On evaporation it left a thick 

 glutinous matter resembling mucilage, soluble with heat in 

 weak nitric acid, and letting fall on cooling m white pulve- 

 ^•uleot substance, that had all the characters of mucous 

 acid.. 



In this experiment water took up only 8 parts of the ^ '"'''"' "'^'^ 

 matter insoluble in alcohol. The remainder was subjected 

 to. the action of nitric acid assisted by heat, which dissolved 



it 



