History of Map making and Topography.—II

C. W. Larned
1907 Scientific American  
An American manufacturer of cut nails gives us at the same time a more practical view of the rolled iron industry of the period as affecting that brancl. of the hardware trade in referring to the use of imported plates and domestic plates of rolled iron for the cutting of nails. "The fact is, that American iron, although the are is excellent, is brought to the market and sold in an unfinished state. It is not sufficiently hammered to be sound, and it is hammered in a state so cold that the
more » ... cold that the seams and cracks, of which there are many, do not close and weld. The iron, therefore, to the worker or consumer is worth by less than $10 per ton than iron furnished in the style of Russia or Sweden iron.
doi:10.1038/scientificamerican08311907-132supp fatcat:6mufhiqszfdb7czonrqipry3ay