NOTE.-All English iron is manufactured by rolling, except that used for machinery, hich is forged by hammering. Pig iron is cast. Swedish bar iron is refined and manufactured by hammering, the price of which has ranged in Sweden at about fifty American dollars per ton, and at New York from $72 50 to $95 per ton.

No. 9-Continued.

Average prices of No. 1 pig iron at Glasgow, from 1843 to 1852, inclusive.

Average prices of No. 1 pig iron at New York, from 1843 to 1852, inclusive.