ON SOME N.S.W. TAN-SUBSTANCES. 39 



I am indebted to Rev. Dr. Woolls for this bark. It is deeply- 

 fissured ; the kino is in more or less distinct small cavities in the 

 bark, giving it a pitted or beaded appearance. The bark dull-looking 

 and pulverulent, the kino in dull, never large, masses. This bark 

 readily yields its kino to water, forming a liquid of a very intense 

 reddish-brown colour. It yields 67 per cent of extract to water at 

 at 100° C, or 33 per cent, of residue. Of this residue a portion equal 

 to 0*26 per cent, of the total quantity of bark acted upon, is soluble 

 in alcohol at 60° F. The bark is soluble in alcohol at 60° F. to 

 the extent of 18*84 per cent., forming a rich garnet liquid. Kino- 

 tannic acid, 41*9 per cent. 



Qualitative Tests. — (Dilute Extract). 



1. Reaction distinctly acid. 



2. Equal volume of sulphuric acid (1 in 5). In the cold, light 

 brown ppt. On boiling, ppt. darkens and rises to the top as 

 a scum. 



3. Bromine water — Reddish-brown ppt. 



4. Dilute ferric chloride — Brownish-purple colour. Add 



Ammonia— Slight ppt. 



5. Baric hydrate — Reddish-brown ppt. 



6. Ammonium sulphide — Reddish-brown colour. 



7. Potassium bichromate — Dark brown ppt. 



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



Orange-brown ppt. 



9. Copper sulphate — Slight pale-brownish ppt. Add Ammonia 



— 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 — Brown ppt. 



12. Manganese sulphate — No change. 



13. Chrome alum — No change. 



14. Mercuric chloride — Light brown gelatinous ppt. 



15. Hydro disodic phosphate — Abundant purple ppt. 



16. Potassium ferro-cyanide — Darkens the colour. 



Eucalyptus siderophloia, Benth., (E. resinifera, A. Cunn.) N.O. 

 Myrtacese, B. Fl. iii., 220. " Broad-leaved" or " Bed Ironbark." 



Found — In New South Wales and Queensland. Locality of the 

 particular specimen now under examination : — Bichmond, N. S.W. 



Remarks — A. bark of trunk, with adherent kino. B. bark of trunk; 

 no kino visible to the naked eye. C. kino. Diameter of stem 3 

 feet the ground, up to 12 inches. Height of tree, 40 to 50 feet, 

 (a small tree of its kind). Date of Collection, July 1886. Date 

 of Analysis, 17th and 23rd May, 1887. 



