Note 50-* — THE AUTHOR’S PRINTING AND PUBLISHING ASSISTANT.

Engraving on Steel is a modern and highly important improvement. Previously, elaborate Engravings on Copper would lose their delicate tints after Printing a few hundred copies, but from Steel many thousand impressions may be taken without the slightest perceptible difference between the first and the last. To this is chiefly attributable the present very moderate price of beautifully Embellished Works, the use of Steel instead of Copper rendering it no longer necessary to Re-Engrave the Plates.