OF ANTHRACITE CAST IRON. 533 
No. 1. No. 2. 
Rhonson. Pin Melin. 
Silicate of alumina : 20.60 
Alumina 
10 
Magnesia ; 25 
Tron : 34.95 
Manganese - 80 
Sulphur : 
Carbonic acid and water 4 32.65 
Oxygen with iron : 9.95 
Ditto witl manganese . 46 
Total found : 99.76 
24 
100.00 
Having ascertained the constituents of the 
anthracite formations, and their fitness for the 
smelting furnace, it now becomes necessary to 
direct attention to the properties of the iron made 
from this fuel. On a former occasion forty-nine 
different sorts of the British irons were experi- 
mented upon; they were carefully tested, and 
the results (accompanied with considerable detail) 
have since been printed in the society’s Memoirs. 
The anthracite irons have undergone a similar 
treatment; and the experiments having been 
conducted under the immediate superintendence 
of my friend, Mr. Hodgkinson, I have no hesita- 
tion in vouching for the accuracy with which they 
were made. 
