40 ON SOME N.S.W. TAN-SUBSTANCES. 



I am indebted to Rev. Dr. Woolls for this kino yielding bark. It 

 is more or less foliaceous. The kino is not uniformly distributed 

 throughout the bark-mass as in E. leucoxylon, but in masses of a 

 pure reddish-brown, and almost transparent. As I received the 

 kino in situ, it occurred to me that it would be practically useful 

 and convenient to present the results of examination in three 

 different ways, viz. : — A. Bark of trunk, with adherent kino ; an 

 average sample i.e., exhibiting the kino and bark in about the 

 proportions in which they usually exist in nature. B. Bark of 

 the trunk ; no kino visible to the naked eye. C. Kino ; all woody 

 matter has been carefully removed. This is therefore about the 

 state in which "best selected kino " will be sent to market in the 

 future. 



A. Extract, soluble in water at 100° C. 

 Kino-tannic acid ... 



B. Extract, soluble in water at 100° C. 

 Kino-tannic acid ... 



C. Extract, soluble in water at 100° C. 

 Soluble in alcohol at 60° F. 

 Kino-tannic acid ... 



Qualitative Tests. — (Dilute extract of kino). 



1. Reaction distinctly acid. 



2. Equal volume of sulphuric acid (1 in 5). In the cold, no 



change. On boiling, clear pale ruby liquid. 



3. Bromine water — No change. 



4. Dilute ferric chloride — Dark brownish purple liquid. Add 

 Ammonia — No change, except perhaps more intense colour. 



5. Baric hydrate — Light purplish-brown gelatinous ppt. 

 b. Ammonium sulphide — Orange-brown colour. 



7. Potassium bichromate — Very dense ppt. of a coffee colour. 



8. Tartar emetic — No change. Add Ammonium chloride — ■ 



Cafe-au-lait ppt. 



9. Copper sulphate — No change. Add Ammonia — Intense 



Vandyke-brown ppt. 



10. One drop of strong sulphuric acid to one drop extract (on a 



white glazed tile). Warm brown colour. 



11. Lead nitrate — No change. 



12. Manganese sulphate — No change. 



13. Chrome alum — No change. 



14. Mercuric chloride — Faint whitish ppt. 



15. Hydro disodic phosphate — No change. 



16. Potassium ferrocyanide— Darkens colour. 



68-1 per 



cent 



26-48 , 



> 



26-56 



5) 



10-4 



5 



97-56 



5 



13-98 



) 



35-1 



5 



