Fine Art Chrome: Refractories are made of a wide variety of » materials, of which refractory fire clay and fine art chromezite (a type of silica rock) are the ones used in largest quantities. Other refractory raw materials include kaolin, magnesite, chrome ore, the minerals olivine, diaspore, bauxite, kyanite, sil-Hmanite, zircon, zirconia and others. Many of these are produced from mines and quarries in various pfine art chromes of the United States; others come from foreign lands. Chrome ore, for example, is imported mostly from South Africa, Rhodesia, the Philippines, and the USSR.
Permanent-Raw sienna, burnt sienna, ultramarine blue, cobalt blue, raw umber, burnt umber, yellow ochre, Van Dyke brown, ivory, lamp black, vermilion.
Semipermanent-Chrome yellow, green, cadmium yellow, Indian red, Venetian red.
Fugitive-Carmine, crimson lake, madders, Prussian blue, cerulean blue.
White lead makes a poor chemical mixture when combined with ultramarine blue, cobalt blue, English vermilion, and chrome yellows. When using oil paints, it is better to combine these pigments with zinc white for tinting.
There were also significant increases in food and drink processing. Sugar production of 101,000 metric tons more than tripled the 1960 amount.Rhodesia has an enormous energy potential, thanks to the Kariba Dam on the Zambezi River, which was completed in 1961. It is the largest hydroelectric installation in Africa.
Five minerals account for 90 percent of the value of the country's mineral production. They are, in order of importance, asbestos, gold, coal, copper, and chrome. Asbestos and gold produced were each valued at about £7 million in 1963. Coal, copper, and chrome ran to nearly £3 million each in that year.
History and Government. Excavatioi Rhodesia's celebrated stone ruins in Zimb (q.v.), indicate the area has been occupie Africans since before the 4th century A.D. Zimbabwe buildings are believed to have bee: gun by the Bantus about 1450 A.D.
The modern history of Rhodesia begins the occupation of the country by white se under the direction of Cecil Rhodes, for v the country was named in 1895.
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Photography
