OF ANTHRACITE CAST IRON. 527 
carbon, and the remaining ten parts are composed 
of carburetted hydrogen, carbonic oxide, and some 
earthy matter. Out of two specimens sent me 
from the Ystalyfera works, the following results 
were obtained— 
Loss at a red heat, yielding a little 
carburetted hydrogen ......+++.+- 5.4 
Ashes, greyish white .......s+se+0+ 4.6 
CasbON cicncy-scnrasnyaenasagan sane seach 90.0 
100.0 
From this description of fuel, we derive the 
best qualities of anthracite iron. 
At the iron works of Vezille, in the canton of 
Launure, near Grenoble, large sums of money 
(500,000 francs) were expended in the construc- 
tion of works, and in making experiments for the 
fusion of the earthy carbonate of iron, by the 
anthracite of Launure. These works were in 
progress from 1824 to 1828, when they were 
abandoned, the proprietors being no longer able 
to contend against obstacles which seemed insur- 
mountable. Many interesting results were never- 
theless obtained from the experiments made at 
the time. 
The ashes of this anthracite gave the following 
