YELLOU- COLORS.—The yellow of quercitron is discharged by chlorine and sulphurous acid, and it is not sensibly changed to orange by either caustic potash or tin salt. The yellow of back thorn ...
The new process appears to produce merchantable iron at the first rolling, and at Pittsburgh, from a very inferior pig iron, made of one-half sulphurous Canada ores, and one-quarter Lake Superior ...