This sample was forwarded by Capt. Hutton. It is hydrated sesquioxide of iron of fair quality. It yielded:—

Water	7 per cent.
Sesquioxide	55 per cent.
Earthy matter (chiefly silica) 38 per cent.

The silica (about 20 per cent.) would require lime for its removal. Equal to 38.5 per cent. per metal.