388 Mr A. Galletly on Resin-Producing Trees, [sess. lih 



readily in acetone. Sulphuric acid gives with it a deep 

 brown at once, but nitric acid produces no colour. 

 The ether resin is dark brown in colour. It is — 



1. Insoluble in bisulphide of carbon. 



2. Du. in turpentine. 



3. Do. in benzole. 



4. Uo. in chloroform. 



5. Do. in olive oil. 



6. Eeadily soluble in acetone. 



The alcoholic resin is brittle and dark brown. It is the 

 same in soluble characters as that got with ether. Both give 

 reddish-brown with nitric and 1)rown with sulphuric acid. 



Ivy — Hedera Hdix. — The specimen examined was a large 

 stem (about 5 inches in diameter) of the common ivy, the 

 specific gravity of which was •607. A second specimen of 

 this wood was found to have a specific gravity of "540. 



The heavier of these gave of resinous extract — 



With naphtha, . . 1'125 per cent. 



With ether, . . . -200 



With alcohol, . . . ::5-218 



Nayldha liesin. — This is a very pale resin in solution 

 but darkens to Ijrown on drying. It keeps soft, and gives 

 no colour reaction with nitric, but turns dark brown with 

 sulphuric acid. 



Ether Resin. — Creeps up basin on drying. No colour re- 

 actions with acids. 



Alcohol Renin. — The solution of it is })ale; the dried resin 

 brownish and l)rittle, transparent in tliin layers. It is — 



1. Insoluble; in bisul])liide of carbon. 



2. Do. in turpcuitiue. 

 ."-». Do. in bcmzolc. 



4. l)o. in olive, oil. 



5. Very slightly sijluble in chloroform. 

 G. Slightly soluble in glacial acetic acid. 



7. Soluljle in acetone. 



It has no reaction with nitric, liut blackens at once with 

 sulphuric acid. 



