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There, she remained until November 27, 1867, when she was sold at auction to J. F. Armstrong for scrapping. Though the remainder of the vessel was scrapped, two 7-inch Brooke rifles and two 6.4-inch Brooke rifles were preserved and are still on display in the Old weapons exhibit in East Willard Park at the Washington Navy Yard, Washington, D.C.
Keokuk was one of the first warships to be of completely iron construction, with wood used only for deck planks and filler in the armor cladding. Her hull construction consisted of five iron box keelsons and one hundred 1-inch-thick (some sources report the thickness as 3/4 inch) by 4-inch-deep iron frames spaced 18 inches between centers.
Pantograph used for scaling a picture. In wood type manufacture a cutting tool would be moved around the letter rather than a pen. [41]Modern wood type, mass-produced by machine cutting rather than hand-carved, was invented by Darius Wells (1800–1875), who published his first known catalogue in New York City in 1828.
The four sisters used the same primary and secondary armament of the Orions, ten 45-calibre Mk V 13.5-inch (340 mm) main guns and 16 50-calibre Mk VII 4-inch (102 mm) secondary guns, and 12-inch (305 mm)-thick belt armour, but were longer at 597 feet 9 inches (182 m) and displaced 25,420 long tons (25,830 t).
1917 press room, using a line shaft power system. At right are several small platen jobbing presses, at left, a cylinder press.. With the advent of the Industrial Revolution and industrial mechanisation, inking was carried out by rollers that passed over the face of the type, then moved out of the way onto an ink plate to pick up a fresh film of ink for the next sheet.
This is achieved by placing a rectangular array of bronze matrices, each of which is 0.2 inch square, in a holder, called the matrix-case. Originally, it contained 225 matrices, in 15 rows and 15 columns; later versions of the Monotype caster expanded that first to 15 rows and 17 columns (255 matrices), and then to 16 rows and 17 columns (272 ...
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