and Observations on Wootz. 
S3i 
tion, that a little of the brownish substance fused with the fluxes 
by the flame and blowpipe, did not afford a reddish or purple 
glass from the exterior or white flame ; nor a colourless one 
from the interior blue flame. 
The experiments (§5. a — d) were also made on steel wire 
with the same result. 
( e ) A few drops of diluted nitrous acid were applied to a 
piece of polished wootz, steel, and iron. The parts of the 
wootz and steel so wetted became black, but the iron was made 
brown. 
§ 6 . Experiments with diluted Sulphuric Acid. 
This acid liquor was made by mixing one measure of con- 
centrated sulphuric acid with three of pure water. 
Before I felt any degree of confidence in these experiments 
with respect to the carbon, and the proportions of hydrogen 
gaz from wootz and water, I repeated them often ; but I here 
think it necessary to relate only one experiment. 
200 grains of wootz, from the surface of which oxide, and any 
other extraneous matter, had been carefully rubbed off, were 
put into a retort with five ounce measures of diluted sulphuric 
acid. In the temperature of 55 0 of the room, in twenty-four 
hours, about a pint measure of gaz came over into a jar filled 
with, and standing over, lime-water ; without any disturbance 
of its transparency, or diminution of the bulk of the gaz. The 
liquid in the retort became green, and a quantity of black 
wool-like sediment appeared upon the undissolved wootz. 
On applying the lamp the dissolution went on rapidly, and 
black matter continued to be separated, and gaz to rise, till 
the whole of what seemed to be soluble in the menstruum 
