106 MR. W. FAIRBAIRN ON THE PROPERTIES OF 
of sufficient purity to be fused with cast iron. 10/bs. of it 
melted with 112/bs. of cast iron gave a mixture containing 
about 24 per cent of nickel. 
The object of these fusings was to reduce the metallic 
oxide by means of the charcoal, while the lime and sand 
removed the oxide of iron, silica, sulphur and other impu- 
rities by forming a fusible slag. 
Mixtures of nickel with cast iron (No. 1) and Blaenarvon 
iron (No. 3) and Pontypool iron, each containing about 
24 per cent of nickel, and also some pure Blaenarvon cast 
iron (No. 1) were cast into bars about one inch square 
and two feet six inches long, and subjected to the follow- 
ing experimental tests : — 
