and Observations on Wootz. 
333 
shall prove, that no such combination takes place ; and I now 
consider it to be most probable, that the diminution arises 
from the dissolution of the last portions of adhering iron. 
With respect to the quantities and nature of the gaz sepa- 
rated in this experiment : 
i. The quantity of it from each hundred grains of wootz, 
on trials at different times, was found to be from 78 to 84 
ounce measures : the mean quantity was therefore 81. 
11. The gaz from each hundred grains of steel wire, after 
many trials, was found to be from 83 to 86 ounce measures : 
the mean quantity was therefore 84^-. 
hi. The gaz from each hundred grains of bright iron wire, 
by many trials with the same and different parcels of wire, 
was found to be from 86 to 88 ounce measures : the mean 
quantity therefore was 87. 
It is to be understood, that when the quantities of the dif- 
ferent parcels of gaz were compared with one another they 
were measured at the same temperature, and under the same 
degree of pressure. It is likewise to be understood, that when- 
ever the solutions of wootz, steel, and iron, were made at the 
same time, and under the same circumstances as far as known, 
there was uniformly a smaller bulk of gaz from wootz than 
from steel, and from steel than from iron. 
The smell of the gaz from the above three substances was 
that of hydrogen gaz : but I thought that from wootz had a 
stronger and more offensive smell than from steel ; and that 
from steel was more offensive than from iron. 
I could perceive no difference in the kind of flame, and 
explosion, between these three parcels of hydrogen gaz : they 
MDCCXCV. X X 
