Metallurgy. 131 
This residue, chiefly titanic acid, contained, however, some iron, and 
was not so pure as that obtained by burning the graphite, given in the 
above table. The following are the tabulated results of the analyses of 
the three samples of pig: 
I. II, III. 
rbon, . - - 3°31 318 311 
Silicium, - - - - 1°86 3°28 8:55 
on, - - - - - 93°47 92°79 92°04 
Manganese, - vie 50 48 1-09 
Sulphur, - — - ae "071 058 112 
Phosphorus, - - - ‘076 062 093 
Titanium, - - - - 1150 “Tl ‘470 
100437  —-100°560 100465 
In all these the carbon was combined ; and traces of antimony, nickel, 
copper, and cobalt were found in all three samples. Samples 1. and 1. 
were No. 3 grey iron; and sample 11. was bright iron. 
The percentage of titanium given in the above analyses differs from 
that in the preceding table, due probably to the chlorhydric acid dis- 
solving some of the titanium. From 15 to 16 grains of the pig are dis- 
solved in nitro-chlorhydric acid, and the solution evaporated to dryness, 
the silica separated in the usual way, and volatilized with fluohydric 
and sulphuric acids, the residue fused with a little bisulphate of potash, 
dissolved in cold water, and added to the filtrate from the silica. The 
the Cornish ores used: 
* Analysis made in my laboratory by Mr, Betley. 
