Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 232
uch a thing. Besides this manual work, some of the en-graving is done by machinery, as for exam-ple the background of the portrait and of theborders, and the shading of the letters — thisbeing done by what is known as the ruling-ma-chine, which can rule several hundred perfectlystraight lines… … ONE OF THE STEEL-ENGRAVERS AT WORK. ber of wheels of all sizes and in all sorts ofarrangements, together with a complicatedmechanism of eccentrics and rods, all of which 220 HOW PAPER MONEY IS MADE. [Jan. is incomprehensible to any one but an expertmachinist. By a proper adjustment of its parts,…
Children's literature
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