Professor of Mathematics, United States Navy.
Professor, February 1, 1839. Retired List, April 16, 1878.
He was the son of Amos Yarnall and Phoebe Schwing Yarnall.
His parents were married January 27, 1814 at Champaign County, Ohio.
On October 15, 1855 as Mordecai Yarnall, he married Ellen Johnston Hepburn at the District of Columbia
They were the parents of one child.
Mordecai Yarnall is best known for his work on star catalogues. He was appointed a Professor of Mathematics in 1839, worked with O.M. Mitchel at the Cincinnati Observatory during the 1840s and came to the Naval Observatory in 1852. At the Naval Observatory Yarnall became the quintessential observer with the meridian instruments, including the 5.3-inch transit instrument and the mural circle. Yarnall's star catalogs of 1873 and 1878 gained wide respect for the Observatory.
[He was NOT married to Emily Chapline. She was married to Mordecai Yarnall (died before 1850) who was the son of Peter Yarnall and Lucinda Sprigg Yarnall, both of Ohio County, West Virginia. The Wheeling Daily Register published Friday, February 24, 1865 refers to "the heirs of Mordecai Yarnall" for an auction for property listed in the will of Zachariah Sprigg, his maternal grandfather.}
Professor, February 1, 1839. Retired List, April 16, 1878.
He was the son of Amos Yarnall and Phoebe Schwing Yarnall.
His parents were married January 27, 1814 at Champaign County, Ohio.
On October 15, 1855 as Mordecai Yarnall, he married Ellen Johnston Hepburn at the District of Columbia
They were the parents of one child.
Mordecai Yarnall is best known for his work on star catalogues. He was appointed a Professor of Mathematics in 1839, worked with O.M. Mitchel at the Cincinnati Observatory during the 1840s and came to the Naval Observatory in 1852. At the Naval Observatory Yarnall became the quintessential observer with the meridian instruments, including the 5.3-inch transit instrument and the mural circle. Yarnall's star catalogs of 1873 and 1878 gained wide respect for the Observatory.
[He was NOT married to Emily Chapline. She was married to Mordecai Yarnall (died before 1850) who was the son of Peter Yarnall and Lucinda Sprigg Yarnall, both of Ohio County, West Virginia. The Wheeling Daily Register published Friday, February 24, 1865 refers to "the heirs of Mordecai Yarnall" for an auction for property listed in the will of Zachariah Sprigg, his maternal grandfather.}
Professor of Mathematics, United States Navy.
Professor, February 1, 1839. Retired List, April 16, 1878.
He was the son of Amos Yarnall and Phoebe Schwing Yarnall.
His parents were married January 27, 1814 at Champaign County, Ohio.
On October 15, 1855 as Mordecai Yarnall, he married Ellen Johnston Hepburn at the District of Columbia
They were the parents of one child.
Mordecai Yarnall is best known for his work on star catalogues. He was appointed a Professor of Mathematics in 1839, worked with O.M. Mitchel at the Cincinnati Observatory during the 1840s and came to the Naval Observatory in 1852. At the Naval Observatory Yarnall became the quintessential observer with the meridian instruments, including the 5.3-inch transit instrument and the mural circle. Yarnall's star catalogs of 1873 and 1878 gained wide respect for the Observatory.
[He was NOT married to Emily Chapline. She was married to Mordecai Yarnall (died before 1850) who was the son of Peter Yarnall and Lucinda Sprigg Yarnall, both of Ohio County, West Virginia. The Wheeling Daily Register published Friday, February 24, 1865 refers to "the heirs of Mordecai Yarnall" for an auction for property listed in the will of Zachariah Sprigg, his maternal grandfather.}
Professor, February 1, 1839. Retired List, April 16, 1878.
He was the son of Amos Yarnall and Phoebe Schwing Yarnall.
His parents were married January 27, 1814 at Champaign County, Ohio.
On October 15, 1855 as Mordecai Yarnall, he married Ellen Johnston Hepburn at the District of Columbia
They were the parents of one child.
Mordecai Yarnall is best known for his work on star catalogues. He was appointed a Professor of Mathematics in 1839, worked with O.M. Mitchel at the Cincinnati Observatory during the 1840s and came to the Naval Observatory in 1852. At the Naval Observatory Yarnall became the quintessential observer with the meridian instruments, including the 5.3-inch transit instrument and the mural circle. Yarnall's star catalogs of 1873 and 1878 gained wide respect for the Observatory.
[He was NOT married to Emily Chapline. She was married to Mordecai Yarnall (died before 1850) who was the son of Peter Yarnall and Lucinda Sprigg Yarnall, both of Ohio County, West Virginia. The Wheeling Daily Register published Friday, February 24, 1865 refers to "the heirs of Mordecai Yarnall" for an auction for property listed in the will of Zachariah Sprigg, his maternal grandfather.}
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