042 
INDIAN MEDIOINAI. PI, ANTS. 
hydrates causes it to assume immediately a cherry-red colour, which quickly 
passes into brick-red and olive-green. 
Owing to the insolubility of the crystals in water a proof spirit solution 
was used in applying the following tests : — 
1. A solution of silver nitrate in proof spifit produced a bluish-black 
colour immediately, and after the liquid had stood for a few minutes black 
particles of reduced silver were precipitated. 
2. A solution of neutral acetate of lead in proof spirit gave a light-red 
bulky precipitate insoluble in boiling acetic acid. 
3. Lime water imparted an orange colour, which quickly changed to olive- 
green, followed by a precipitate of the same colour. 
4. An aqueous solution of copper gave a golden yellow colour, quickly 
followed by a dirty brown precipitate, the supernatant liquid being distinctly 
greenish. 
5. Solution of ferric chloride (acid! produced a brownish-red colour, which, 
in a few minutes, turned smoke-colour. 
6. Solution of subacetate of lead gave a golden yellow precipitate. 
7. An aqueous solution of mercuric chloride produced a white precipitate. 
8. An aqueous solution of permanganate of potash, acidified with sulphuric 
acid, was instantly decolorized. 
0. A solution of the crystals in proof spirit did not reduce Pehling. 
The authors say “ We have attempted to hydrolyse this body, by subject- 
ing a strong alcoholic solution to the prolonged action of 10 per cent, solution 
of sulphuric acid at a boiling temperature, but without success. 
“ We have also inquired into its nature and centesimal composition, but 
the results so far obtained are not sufficiently conclusive to be incorporated 
in this paper. We hope to be able to publish shortly a supplementary note 
dealing with points in process of investigation. Mean while, we propose that 
this interesting principle be designated Oroxyli n.” 
C. The marc left after exhaustion with petroleum spirit and ether was 
percolated with cold absolute alcohol. The residue resulting from the 
distillation of the spirit was treated with cold proof spirit, which took up 
the greater part of it. The insoluble portion dissolved readily in boiling 
proof spirit, and, on examination proved to be largely composed of the 
yellow crystalline body oroxvlin. The cold proof spirit solution of the 
alcoholic residue was evaporated to dryness and the extract treated with 
water and filtered. The filtrate was treated successively with neutral and 
basic acetate of lead, and the precipitates after washing were suspended 
in water, decomposed by a current of sulphuretted hydrogen and the result- 
ant plumbic sulphide removed by filtration Sulphuretted hydrogen was also 
passed through the filtrate from thcj-basic or plumbic acetate and iWie 
precipitated lead sulphide removed by filtration. 
The three liquids thus obtained, which for convenience may be denomi- 
nated i„ ii., iii., were then evaporated down and the respective residues 
examined. 
Ii.) It was dissolved in the smallest quantity possible of cold water and 
diluted with many times its volume of alcohol. After setting aside for 
