Dictionary of US History
|Explorers of the US
Karl G. Jansky (1905-1949) was an American radio engineer who pioneered and developed radio astronomy. In 1932, he detected the first radio waves from a cosmic source - in the central region of the Milky Way Galaxy.
Thomas Jefferson (1743-1826) wrote the Declaration of Independence and was the third president of the USA, serving from 1801 to 1809.
|Jemison, Mae C.
Mae C. Jemison (October 17, 1956 - ) was the first African-American woman in space. Dr. Jemison is a medical doctor and a surgeon, with engineering experience. She flew on the space shuttle Endeavor (STS-47, Spacelab-J) as the Mission Specialist; the mission lifted off on September 12, 1992 and landed on September 20, 1992.
|Jensen, James A.
James A. Jensen is a US paleontologist from Brigham Young University who discovered Supersaurus (1972) and Ultrasauros (1979). He named Cathetosaurus (1988), Dystylosaurus (1985), the family Torvosauridae (1985), and Torvosaurus (with P.M. Galton, 1979).
The engineer Richard James (1914-1974) invented the Slinky TM in 1943. This spring-toy came about by accident as James was developing springs to support sensitive equipment on ships. James invented a manufacturing machine that could make a Slinky TM from 80 feet of steel wire in 10 seconds. His wife Betty James (1918- ) named the Slinky TM and runs the company that produces it.
Karl Gothe Jansky (1905-1949) was an American radio engineer who pioneered and developed radio astronomy. In 1932, he detected the first radio waves from a cosmic source - in the central region of the Milky Way Galaxy.
Johnson, William Henry
William Henry Johnson (1901- 1970) was an African-American artist who was associated with the Harlem Renaissance art movement. Johnson was born in Florence, South Carolina, but as a teenager, went to study at the National Academy of Design in New York. He painted in France from 1926 to 1930. When he returned to the USA, he opened a studio in Harlem. Johnson had his first solo art exhibition in New York in 1941. Johnson's vibrant paintings represent many subjects, ranginf from scenes from everyday life to historical commemoratives of African-Americans, including Harriet Tubman, George Washington Carver, and Matthew Henson.
Louis Joliet (1645-1700) was a Canadian explorer (born in Québec City) who explored the Canadian wilderness, including the Great Lakes area. He and Father Jacques Marquette found the Mississippi River in 1673; they were the first Caucasians to see the Mississippi River. Together, they travelled along Lake Michigan to Green Bay, canoed up the Fox River, and went downstream on the Wisconsin River to the Mississippi River. They travelled almost to the mouth of the Arkansas, and then stopped because they were warned of hostile Indians and Spanish explorers. They returned via the Illinois River, then the Chicago River to Lake Michigan. Joliet's journal and his maps were lost when his canoe overturned on the rapids of the Montreal River. Marquette's diary is all that remains of their journey. Joliet expanded fur trade westward, did extensive mapping, and established a fort on Anticosti Island.
Scott Joplin (1868-1917) was a great composer and pianist. As a boy in Texarkana, Texas, Joplin taught himslef to play the piano. He played and composed ragtime music, a lively, unique genre. He composed over 60 pieces (most for piano), including the "Maple Leaf Rag" and "The Entertainer," which are still popular today. Joplin also wrote two operas.
Barbara Jordan (Feb. 21, 1936-Jan. 17, 1996) was the first black U.S. congresswoman from the deep South; she served Texas for six years in the US House of Representatives. Jordan was a powerful orator who fought for civil rights and the rights of the poor.
|Judson, Whitcomb L.
Whitcomb L. Judson was an American engineer from Chicago, Illinois, who invented the a metal zipper device with locking teeth in 1890. Judson patented his "clasp-locker'' on Aug. 29, 1893; later in 1893, he exhibited this new invention at the Chicago World's Fair. He never succeeded in marketing his new device. The zipper was improved by the Swedish-American engineer, Gideon Sundbach, and was named by the B.F. Goodrich company in 1923. Judson died in 1909, before his device became commonly used and well known.
Dictionary of US History
|Explorers of the US
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