554 INQUIRY INTO THE STRENGTH 
After the preceding experiments were made, 
Mr. Richard Evans forwarded from the pro- 
prietors of the Ystalyfera iron works, other 
samples of the iron, Nos. 1, 2, and 3, which, I was - 
informed, were made with anthracite coal alone, 
whilst the first samples were smelted with anthra- 
cite, mixed with a small portion of bituminous 
coke. In both cases a blast of heated air was 
used. Feeling desirous of ascertaining the com- 
parative strength of the iron in the two cases, I 
cheerfully acceded to the wishes of the proprie- 
tors, and had experiments made upon the second 
sample, precisely similar to those made on the 
first. 
