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William A. Morgan

mechanical engineer and rocket scientist, was born John W. Blanton in Louisville, Kentucky, the son of John O. and Carolyn Blanton.

Blanton attended Purdue University in Indiana, graduating with a bachelor's degree in Mechanical Engineering in 1943. He began his career at Bell Aircraft Corporation in Buffalo, New York, where he worked from 1943 to 1945 and from 1950 through 1956. Initially involved in the research and development of gas and rocket engines, Blanton helped develop the X‐1, which on 14 October 1947 became the first aircraft to break the sound barrier in a human‐operated, level flight.

Two years after marrying Corinne Jones of Mississippi in 1943, Blanton was named the chief engineer of thermo and fluid dynamics at Frederick Flader Incorporated, in Buffalo, New York, where he worked for five years. In 1956 he joined General Electric in Evendale Ohio and continued to make ...

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Robert C. Hayden

mechanical engineer and inventor, was born in Nashville, Tennessee, the son of Dr. David Nelson Crosthwait and Minnie Harris. He attended elementary school and graduated from high school in Kansas City, Missouri.

Crosthwait received a BS in Mechanical Engineering from Purdue University in 1913. That same year he began lifelong employment with the C. A. Dunham Company (later Dunham-Bush) in Chicago, where he distinguished himself nationally in the field of heating, ventilation, and air-conditioning (HVAC) technology. By 1915 he had been appointed to the position of engineering supervisor, and by 1919 he had risen to the position of research engineer. In 1920 Crosthwait received an MS in Engineering from Purdue.

In 1925 Crosthwait became director of research at Dunham, overseeing heat-transfer research, steam-transport research, and temperature-control systems. In 1930 he was designated a senior technical consultant and adviser at Dunham-Bush. Crosthwait married E. Madolyn Towels in 1930 ...

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Aaron Myers

The son of national deputy Antônio Pereira Rebouças, André Rebouças was born in Cachoeira, Bahia. After studying math and engineering at Rio De Janeiro's military school, he traveled and studied in Europe. Upon returning to Brazil, he became an adviser and strategist during the Paraguayan War (1864–1870). Rebouças then supervised several engineering projects, including the construction of railroads and docks in Rio de Janeiro. Rebouças's engineering achievements won him the respect of the royal family. He later became a professor of botany and math at the city's Polytechnic School, where he established an abolitionist society in 1883.

Rebouças conducted most of his abolitionist work behind the scenes, rarely addressing audiences. He organized abolitionist meetings and associations, and inspired readers with his antislavery literature and propaganda. Rebouças cofounded the Sociedade brasileira contra a escravidão (Brazilian Antislavery Society) in Rio de Janeiro in 1880 ...