=199. Iron.= "The great heat to be endured and the severe muscular power required, preclude women from the manufacture of iron goods. They are not directly employed, and to a small extent indirectly. We think when women have to perform what is unquestionably man's work, it lowers the standard of female character instead of elevating, and nothing is more disagreeable than to be constantly employed at labor uncongenial to one's nature." From the United States census we learn that in 1850 there were engaged in the manufacture of pig iron 20,298 males, 150 females; in the manufacture of casting iron, 23,541 males, 48 females; in the manufacture of wrought iron, 16,110 males, 138 females. We do not know exactly how these women were employed. The work in rolling mills is very severe and the heat intense. The men have their limbs cased in tin sheaths above their knees. The vast capital required to develop the mineral resources of a country, and the comparative newness of our country, have hitherto prevented more than a partial development of its resources. Many women are employed in dressing and sorting ore in Great Britain. =200. Files.= The notches in files are made by a chisel acted on by a hammer held in the hand. The edge thrown up in making the notch assists the workman in putting the chisel in the right place, and keeping it there while he cuts the next notch. "It is peculiar that hitherto no machine has been constituted, capable of producing files which rival those cut by the human hand." From a manufacturer in Massachusetts, we learn that "he employs from four to six girls in cutting fine work files, cleaning, and wrapping up, &c. They are largely employed in England. The work is considered healthy. They receive from $3 to $4.50 per week of ten hours a day. Men and women are paid equal wages for the same kind of work. It requires from six months to two years to learn. The prospect for a small number in each factory is good. There is work every day in the year. It is quite a new business in this country. Women are neater and more particular with their work than men. They could do some other parts that are suitable for them, but they would soil their hands too much." A file manufacturer writes me: "Women are paid by the piece in cutlery--in other departments by the day; when by the piece, they receive as much as men; when by the day, one half. It would require three or four years to learn. Most women cannot cut any but small files as well as men, as they have not sufficient muscular power in the hands and fingers. Women are taught in Sheffield, England, by their fathers and brothers, and have what they earn. Good eyesight and stout nerves are the requisites for a learner. No prospect of employment in our business at present. The best localities for manufactures are where files are wanted, in New England and the middle States."