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



A more than ordinarily smooth, homogeneous bark. Small 

 fissures and irregularities rarely occur in it except around buds. 

 Of an umbery colour, with greyish patches. Is very tough, the 

 bast yielding a fair fibre. Average thickness of outer and inner 

 bark together, -§- — - x %-". It is excessively hard when dry. Yields 

 42*16 per cent, of extract to water at 100° C, and therefore 57*84 

 per cent, of woody fibre &c. Of this residue, a portion equal to 

 6*96 per cent, of the total quantity 'of bark acted upon, is soluble 

 in alcohol at 60° F. Catechu-tannic acid 32*08 per cent. 



Qualitative Tests — (Dilute extract). 



1. Reaction slightly acid. 



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



On boiling, reddish-brown ppt. 



3. Bromine water — Dirty yellow ppt. 



4. Dilute ferric chloride — Dark purple colour. Brown ppt on 



standing. Add Ammonia — Deepens the tint. 



5. Baric hydrate — Dark brown ppt. 



6. Ammonium sulphide — Darkens the colour slightly. 



7. Potassium bichromate — Coffee-coloured ppt. 



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



Pink gelatinous ppt. 



9. Copper sulphate — Pinkish ppt, turning reddish-brown on 

 exposure. Add Ammonia — Ppt more copious, and colour 

 intensified (copper brown). 



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

 white glazed tile) — Bright magenta colour. 



11. Lead nitrate — Slight reddish purple ppt. 



12. Manganese sulphate — No change. 



13. Chrome alum — Slight purple-brown ppt. 



14. Mercuric chloride — Light purplish-brown ppt. 



15. Hydro disodic phosphate — -Slight purplish ppt. 



16. Potassium ferrocyanide — Purplish-brown ppt. 



Eucbtphia Moorei, (F.v.M.) N.O. Saxifrages?, B. Fl. h\, 447. Often 

 called " Acacia," by country people, as when not in flower the tree 

 resembles some of the larger species of Acacia. Other vernacular 

 names are " Plum Tree," and " White Sally." 

 Found — In Victoria and New South Wales (Southern districts). 



Locality of the particular specimen now under examination : — 



Monga, near Braidwood, N.S.W. 

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



ground, 3 to 4 feet. Height 40 to 60 feet. Date of Collection, 



3rd October, 1886. Date of Analysis, 12th and 23rd May, 1887. 



This tree flourishes in moist valleys, and the bark is consequently 

 often moss-grown. It is not fissured, but is more or less finely 





