ON SOME NVS.V. TAN- SUBSTANCES. 33 



3. Bromine water — Slight yellow turbidity. 



4. Dilute ferric chloride — Hardly any change with the exception 



of a faint greenish tint. No further change on standing. 

 Add Ammonia — Yellowish ppt, turning to a warm brown on 

 standing. 



5. Baric hydrate — Brown ppt. 



6. Ammonium sulphide — Slight yellow ppt. 



7. Potassium bichromate — No change. 



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



Slight milkiness. 



9. Copper sulphate — Slight greenish ppt. Add Ammonia — Ppt 



dissolved in the Ammonio-cupric sulphate. 



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



a white glazed tile) — Slight reddish colour. 



11. Lead nitrate — Light brown ppt. 



12. Manganese sulphate — Slight brownish ppt. 



13. Chrome alum — Slight ppt. 



14. Mercuric chloride — flight drab ppt. 



15. Hydro disoclic phosphate — No change. 



16. Potassium ferrocyanide — Darkens colour. 



Acacia aneura, var: (F.v.M.) N.O. Leguininosse, (the narrow-leaved 

 variety). B. Fl. ii., 402. " Narrow-leaved Mulga." 

 Found — It has about the range of the normal species. Locality of 



the particular specimen now under examination : — Ivanhoe, via 



Hay, N.S.W. 

 Remarks — The bark of the trunk. Diameter of stem 3 feet from the 



ground, 6 to 8 inches. Height of tree, 25 or 30 feet. Date of 



Collection, 30th Sept., 18S6. Date of Analysis, 17th and 23rd 



May, 1887. 



A moderately fissured bark of a dark grey colour, sometimes 

 nearly black. Removal of epidermis shows a light-brown colour. 

 Bast not readily separable ; light coloured, being yellowish or 

 drab when dry. A thin, poor bark, not exceeding -iV' in average 

 thickness. Yields 20*72 per cent, of extract to water at 100° C. 

 Catechu-tannic acid 8*62 per cent. 



Acacia decurrens, (Willd.) N.O. Leguininosse. B. Fl. ii., 414. The 

 " Green Wattle," of the older New South Wales Colonists. Called 

 also " Silver Wattle," but usually " Black Wattle." 

 Found— In all the Colonies except Western Australia. Locality of 



the particular specimen now under examination : — Cambewarra, 



New South Wales. 

 Remarks — The bark of the trunk. Diameter of stem 3 feet from the 



ground, 6 to 8 inches. Height 20 to 30 feet. Date of Collection, 



10th August, 1886. Date of Analysis, 12th and 23rd May, 1887. 

 C 



