structure evolved from a prehistoric form containing the essential core and crucible.' The transition from the mid-fifteenth century European blast furnace to the early nineteenth century charcoal furnace of Pennsylvania was gradual. Technological changes occurred chiefly in the shape and size of the

were not in operation. 1° Puddling furnaces in eastern Pennsylvania tended to use anthracite coal, according to Temin, the proximity of the mines and the earlier development of canal and rail transportation in the East being advantageous. The Safe Harbor Rolling Mill was cited by Temin as using

take the runaways into custody, they refused to come to the assistance of the government officials. From what I have heard, the marshal and his fellows got things so confused no one knew what was happening—no one knew what was right and what was wrong— what was legal and what was illegal- Seems to me