first printing cylinder
51Laser printer — HP LaserJet 4200 series printer, installed atop high capacity paper feeder …
52Napier & Son — The 1907 Napier 60 hp D. Napier Son Limited was a British engine and pre Great War (the brass era ) automobile manufacturer and one of the most important aircraft engine manufacturers in the early to mid 20th century. Their post First World… …
53Muhammad al-Durrah incident — Muhammad al Durrah incident …
54United States one-dollar bill — For the US one dollar coin, see United States dollar coin. One dollar (United States) Value …
55Xerography — (or electrophotography) is a photocopying technique developed by Chester Carlson in 1938 and patented on October 6, 1942. He received US patent|2297691 for his invention. Although dry electrostatic printing processes had been invented as far back …
56Daniel Leavitt — William Michael Harnett, The Faithful Colt 1890, Wadsworth Atheneum, Hartford, Connecticut. Painting of an early American revolver Daniel Leavitt (1813–59) [1] was an early American inventor who with his partner Edwin Wesson patented the first… …
57Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 …
58Cotton mill — A cotton mill is a factory that houses spinning and weaving machinery. Typically built between 1775 and 1930, mills spun cotton which was an important product during the Industrial Revolution. Cotton mills, and the mechanisation of the spinning… …
59Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …
60Gum bichromate — is a 19th century photographic printing process based on the light sensitivity of dichromates. It is capable of rendering painterly images from photographic negatives. Gum printing is traditionally a multi layered printing process, but… …
