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



267 



present themselves, which had best be indicated in tabular form, 

 for they are very important from a commercial point of view : — 



C. semiglaucum. 



1. Slightly raspy on the outside. 

 This appears to he distinct when 

 once appreciated, though it might 

 be passed over by a " horny- 

 handed" man. 



2. No flutes. 



3. The inside bark has numerous 

 longitudinal grooves or ridges, giv- 

 ing it the appearance of split 

 hardwood. This appears to be 

 characteristic, and brokers and 

 others might do well to bear it 

 in mind. 



4. Inside bark light brown. 



A. decurrens 



1. May be considered perfectly 

 smooth. 



2. Slight longitudinal flutes on 

 the outside. 



3. The inside is usually nearly as 

 smooth as dressed timber. 



4. Inside bark dark reddish- 

 brown. 



Colour of the powder, light yellowish drab. 



Extract. — 28.62 per cent. Colour, rich orange brown, slightly 

 darker than that of Callicoma serratifolia ; of moist residue,, 

 ochrey brown. 



Tannic acid — 14*933 per cent. Non-tannin and impurities — 

 •914 per cent. 



80. Acacia tetragonophylla, F. v. M., N. 0. Leguminosae, 

 B. EL, ii., 330. 



Found in South Australia and New South Wales. 



Sample obtained from Tarella, Wilcannia. " Dead Finish." 

 Height of tree 10 to 12 feet, diameter 6 to 8 inches. Collected 

 22nd August, 1887. Analysed 16th to 17th August, 1888. 



One of the usual dry-country wattle barks, consisting almost 

 entirely of bundles of fibre, even the hoary outside bark being 

 more or less readily separable into long ribbons. The light- 

 coloured inner bark makes excellent coarse tying material. 

 Average thickness of bark, £ inch. Colour of dry powder, light 

 brown. 



Extract. — 14*96 per cent. Colour, light orange-brown ; of 

 moist residue, burnt umber. 



Tannic acid — 5*587 per cent. Non-tannin and impurities — 

 1*625 per cent. 



