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  2. Waterman Ormsby - Wikipedia

    en.wikipedia.org/wiki/Waterman_Ormsby

    Ormsby was an excellent line engraver and was called upon for a great deal of work for bank notes were in wide use by the Government at the time of the Civil War.He designed the five-dollar note, intended to prevent counterfeiting and was the author of several pamphlets, including, "Cycloidal Configurations" or the Harvest of Counterfeiture, and a volume on paper-money engraving entitled, A ...

  3. Engraving - Wikipedia

    en.wikipedia.org/wiki/Engraving

    Other terms often used for printed engravings are copper engraving, copper-plate engraving or line engraving. Steel engraving is the same technique, on steel or steel-faced plates, and was mostly used for banknotes, illustrations for books, magazines and reproductive prints, letterheads and similar uses from about 1790 to the early 20th century, when the technique became less popular, except ...

  4. Laser engraving - Wikipedia

    en.wikipedia.org/wiki/Laser_engraving

    Laser marking on stainless steel A laser engraving machine A laser engraver. A laser engraving machine consists of three main parts: a laser, a controller, and a surface. [2] The laser is a drawing tool: the beam emitted from it allows the controller to trace patterns onto the surface.

  5. Counter-machine model - Wikipedia

    en.wikipedia.org/wiki/Counter-machine_model

    Shepherdson & Sturgis (1963) observe that "the proof of this universality [of digital computers to Turing machines] ... seems to have been first written down by Hermes, who showed in [7--their reference number] how an idealized computer could be programmed to duplicate the behavior of any Turing machine", and: "Kaphengst's approach is interesting in that it gives a direct proof of the ...

  6. John C. Moss - Wikipedia

    en.wikipedia.org/wiki/John_C._Moss

    John Calvin Moss (January 5, 1838 – April 8, 1892) was an American inventor credited with developing the first practicable photo-engraving process in 1863. His work, and that of others such as William Leggo in Canada led to a revolution in printing and eventually to the mass marketing around the world of newspapers and magazines and books which combined photographs with traditional text.

  7. The worst foods to buy in the supermarket and the better ...

    www.aol.com/worst-foods-buy-supermarket-better...

    Health experts recommend reducing a person's intake of ultra-processed foods. A registered dietitian and the CEO of Nourish Science share some helpful ways to spot these foods where you shop.

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