134 MR. F. C. CALVERT AND MR. R. JOHNSON ON THE 



last, differs from it by the granules being rather larger and 

 nearly separated from the scoria, which forms a layer at the 

 top and bottom of the mass. 



These granules are also much more malleable, for they are 

 easily flattened under the hammer. This last fact is easily 

 accounted for by the small amount of carbon which it contains, 

 as stated above and shewn by these results. 



First Analysis. Second Analysis. Mean. 



Carbon 1.000 0.927 0.963 



Silicium... 0.160 0.167 0.163 



Eighth Sample, taken 1 50 p.m. 



This last sample was taken a few minutes before the balls 

 were ready to be taken out of the furnace to be placed under 

 the hammer, and was a part of one of the balls which was 

 separated and placed to cool. 



It was observed that no blue flame issued from the mass as 

 it cooled. The appearance of the sample shewed that the 

 mass constituting the ball was still spongy and granulated, 

 similar to the previous ones. The only difference was that 

 the granules adhered together sufficiently to require a certain 

 amount of force to separate one from the other, and also that 

 they were much more malleable under the hammer. They 

 were found to contain the following quantities of carbon and 

 silicium, per cent. : — 



First Analysis. Second Analysis. Mean. 



Carbon 0.771 0.773 0.772 



Silicium 0.170 0.167 0.168 



We should observe here that the black coating which covers 

 the granules of iron, even of No. 8 sample, preserves the iron 

 from all oxidation, for none of the samples became oxidized 

 during the nine months they were in the laboratory exposed 

 to the atmosphere, and to the various acid fumes floating 

 about. This black coating is probably composed of a saline 

 oxide of iron. 



