ON SOME N.S.W. TAN-SUBSTANCES. 41 



Eucalyptus corymbosa, (Smith), N.O. Myrtacese, B. PL iii., 256. 

 " Bloodwood." 



Found— In New South Wales to Northern Australia. Locality of 

 the particular specimen now under examination : — Cambewarra, 

 N.S.W. 



Remarks — The kino. Diameter of the stem 3 feet from the ground,. 

 3 to 4 feet. Height, 80 to 100 feet. Date of Collection, 28th 

 August, 1886. Date of Analysis, 20th April and 17 th May, 1887. 



This kino is obtainable in irregular pieces as large as a fist. 

 Before they have been bruised, they have the appearance of a very 

 pulverulent, purplish-red haematite (such, for instance, as is 

 common in the Elba mines). To say that it resembles a low-grade 

 Dragon's blood also gives a very good idea of its appearance. It 

 readily makes an impalpable powder of a "Venetian-red colour, 

 soiling everything witli which it comes into contact. Water at 

 100° C. dissolves 72 28 per cent., leaving 27*72 per cent, of 

 residue, strikingly resembling powdered Brazil-woocl in appearance. 

 The solution in hot water readily becomes turbid if it be either 

 slightly lowered in temperature or partly evaporated. The 

 particles suspended in the water are in such a line state of division 

 that they readily pass through a filter-paper. The solution in 

 boiling-water is of a deep garnet colour. The ligneous, insoluble 

 (in water) residue, yields 2*16 per cent, (calculated on the total 

 weight of kino operated upon) of a rich red colouring matter to 

 alcohol at 60° F. Cold water (60° F.) dissolves 35-38 per cent, of 

 the kino. Alcohol at 60° F. dissolves 71 '14 per cent, of the kino. 



Bloodwood kino can be delivered in Sydney for about 3d. per lb. 

 and there is no doubt that it is a cheap and efficient substitute 

 for the lower grades of Dragon's blood. Both the aqueous and 

 alcoholic solutions form excellent wood-stains. (Samples of wood 

 stained by them were exhibited). Experts will probably 

 pronounce the colour to be too " fiery," but it can be brought to 

 the required tint by admixture with Burnt Sienna or Vandyke 

 Brown. As a matter of fact, most wood-stains are compound 

 substances, and the most I claim for this kino at present is that it 

 will form a useful base for stains and varnishes. Whether it will, 

 (and in what measure), supersede the beautiful aniline dyes which 

 now form part of the "material" of the painter and polisher, 

 remains to be seen. Some enterprising firm should put it to 

 serious test without unnecessary delay. 



This kino yields 28*44 per cent, of kino tannic acid. This 

 percentage of tannin is of course low (for a kino) ; nevertheless 

 the abundance of the raw material, and the readiness with which 

 its excellent colouring matter is available, will render this one of 

 the most useful of our kinos. 



