Vozrozhdeniya Island Vozrozhdeniya Island Vozrozhdeniya Island () was an island in the Aral Sea. The former island's territory is split between Uzbekistan and Kazakhstan. In 1954, the Soviet Union constructed a biological weapons test site called Aralsk-7 there and on the neighboring Komsomolskiy Island. Vozrozhdeniya was once a small island; it was only in the nineteenth century. However, in the 1960s, the island began to grow in size as the Aral Sea began drying up as the Soviet Union dammed its feeder rivers for agricultural projects. The shrinkage of the Aral continued and accelerated over time. Vozrozhdeniya became a peninsula in mid-2001
Disappearing-filament pyrometer Disappearing-filament pyrometer The disappearing-filament pyrometer is an optical pyrometer, in which the temperature of a glowing incandescent object is measured by comparing it to the light of a heated filament. Invented independently in 1901 by Ludwig Holborn and Ferdinand Kurlbaum in Germany and Harmon Northrup Morse in the United States, it was the first device which could measure temperatures above 1000°C. Disappearing filament pyrometers have been used to measure temperatures between about 600°C and 3000°C. Like other optical pyrometers they are used to measure the temperature of objects too hot for contact thermometers, such as molten metals. Widely used in