In 1827-8, it was given in evidence before a committee of Congress, that Pennsylvania had made, during the past year, 21,800 tuns of bar iron, and 47,075 tuns of cast iron; that 3,000 tuns of bar iron were made near Lake Champlain; that three counties in New Jersey had made 2,050 tuns, and that in a circle of thirty miles’ diameter, in New York, there were one hundred and ten forge fires, each of them able to produce twenty-five to thirty-five tuns yearly. In 1830, a committee of Congress reported on the iron trade, and from their report and other later sources, we learn that that year 112,866 tuns of bar, and 191,537 of pig iron, worth $13,327,760, employing 29,254 men, who received $8,776,420 in wages, were made. Perhaps the quantity and number of workmen are overstated. In 1840, with improved machinery, only 30,497 men produced 484,136 tuns. Without coal and iron, the United States and Britain never could have risen to the rank of first-rate powers. In fact, without iron, civilization must have made very slow progress, as must be evident to any one who will take the trouble to try seriously to enumerate the various articles _essential_ to society, of which iron is an indispensable part. In 1839-40, according to the official returns, which are imperfect, the United States produced, with 804 furnaces, 286,903 tuns of cast iron, and with 795 blomaries, forges and rolling-mills, 187,233 tuns of bar iron. The capital invested was nearly twenty and a half millions of dollars; the men employed, miners included, were 30,497, and 1,528,110 tuns of fuel were employed in these operations. The value of iron and steel, and their manufactures, imported in 1839-40, as per official returns, was $7,241,407. The estimated value of the iron made in the United States that year, was $22,778,635; of which sum $15,585,730 were for labor, including mining, transportation, coaling, hauling, &c. The persons employed in the iron manufacture, and their families, were estimated at 213,505, which, at twelve and a half cents each, per day, for agricultural products consumed, would give $9,741,166. In 1845, the product of the union was estimated thus: 540 blast furnaces, yielding 486,000 tuns of pig iron; 954 blomaries, forges, rolling-mills, &c. yielding 291,600 tuns of bar, hoop, sheet, boiler, and other wrought iron, 30,000 tuns of blooms and 121,500 tuns of castings; value of the whole nearly forty-two millions of dollars. The United States imported of iron, chiefly bar and bolt, rolled, hammered, or otherwise manufactured, and pig, hoop and sheet, in 1838-9, 115,637 tuns; in 1839-40, 72,769; 1840-1, 112,111; in 1841-2, 107,392; in 1842-3, 38,405.