case-hardened glass
61Plough — Plow redirects here. For the Canadian soldier, see Edward Chester Plow. Plowman redirects here. For the surname, see Plowman (surname). Furrow redirects here. For other uses, see Furrow (disambiguation). For other uses, see Plough… …
62Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 …
63Seismic retrofit — Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. Other retrofit techniques are applicable to areas subject to tropical cyclones,… …
64Sand casting — Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand as the mold material. It is relatively cheap and sufficiently refractory even for steel foundry use. A suitable bonding agent (usually clay)… …
65Royal Observer Corps — Ensign Active 1925–1996 Country …
66Royal Moroccan Air Force — القوات الجوية الملكية المغربية al Quwwat al Jawwiyah al Malakiyah al Maghribiyah Forces Royales Air Active 1956 – present …
67Ireland — Irelander, n. /uyeur leuhnd/, n. 1. John, 1838 1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888 1918. 2. Also called Emerald Isle. Latin, Hibernia. a large western island of the British …
68photography, history of — Introduction method of recording the image of an object through the action of light, or related radiation, on a light sensitive material. The word, derived from the Greek photos (“light”) and graphein (“to draw”), was first used in the… …
69Chevrolet Vega — 1972 Chevrolet Vega GT Hatchback Coupe Manufacturer Chevrolet Division of General Motors Also called Vega 2300 …
70Iron — Fe redirects here. For other uses, see Fe (disambiguation). This article is about the chemical element. For other uses, see Iron (disambiguation). manganese …
