Properties of Rosewood and other Hard Woods. 377 



dry up, on the water bath, to a brittle substance, but 

 remains greasy — thus differing completely from the pine 

 resin character of the rosewoods. 



A Icoholic Extract. 



1. Slightly soluble in benzole. 



2. Slightly soluble in bisulphide of carbon. 



3. Insoluble in turpentine. 



4. Soluble in hot acetic acid. 



5. Readily soluble in acetone. 



Etlier Extract. 



1. Readily soluble in bisulphide of carbon. 



2. Soluble in benzole. 



3. Insoluble in acetic acid, 

 •i. Insoluble in acetone. 



None of the solutions possess the strong tinctorial 

 power of the rosewood extracts. 



A specimen of teak, Tectoim granclis, specific gravity 

 "660, also treated in the same way, gave — 



With naphtha, 3*56 per cent. 



With ether, 042 



With alcohol, 3-54 „ 



And the solubilities of these are : — 



Naphtha Extract, 



1. Soluble in benzole, but not readily. 



2. Almost insoluble in alcohol. 



3. Almost insoluble in ether. 



4. Soluble in turpentine. 



Ether Extract (soft and almost greasy). 

 1 Soluble in benzole. 



2. Soluble in bisulphide of carbon. 



3. Soluble in turpentine. 



4. Slightly soluble in hot olive oil. 



5. Insoluble in hot acetic acid. 



6. Soluble in chloroform. 



7. Soluble in acetone, but much less so than is the case 

 with ether extracts of the rosewoods or mahogany. 



