"Steel plate" Quotes from Famous Books
 ... gauged hole, and by a machine pressed into a semi-cylindrical shape. In the same machine it is pierced with the required slit or slits. This being effected, the pens are cleaned by mutual attrition in tin cylinders, and tempered, as in the case of the steel plate, by being brought to the required color by heat. Some idea of the extent of this manufacture will be formed from the statement, that nearly 150 tons of steel are employed annually for this purpose, producing upward ...
— Harper's New Monthly Magazine, Volume 1, No. 4, September, 1850 • Various |
