Gabriel Gabrielsen Holtsmark
Encyclopedia
Gabriel Gabrielsen Holtsmark (1 February 1867 – 1954) was a Norwegian educator, physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...

 and actuary
Actuary
An actuary is a business professional who deals with the financial impact of risk and uncertainty. Actuaries provide expert assessments of financial security systems, with a focus on their complexity, their mathematics, and their mechanisms ....

.

Personal life

He was born in Asker
Asker
Asker is a municipality in Akershus county, Norway. It is part of the Viken traditional region. The administrative centre of the municipality is the village of Asker. The municipality is a suburb of Oslo, the national capital...

 as a son of farmer and mayor Bent Holtsmark
Bent Holtsmark
Bent Holtsmark was a Norwegian agriculturalist and politician.He was born in Lier, but moved to Asker in 1849. He was a farmer at Tveter farm, and also owned the farms Berg, Vøien and Sem. He was decorated with the King Oscar II Medal for his work in agriculture, and was also mayor of Asker from...

 and his wife Anne Elisabeth Gabrielsen. He was a brother of Bernt
Bernt Holtsmark
Bernt Holtsmark was a Norwegian farmer and politician for the Conservative Party and the Liberal Left Party. He was a four-term member of the Parliament of Norway, and served as Minister of Agriculture from 1910 to 1912...

, Torger
Torger Holtsmark
Torger Holtsmark was a Norwegian farmer and politician for the Conservative Party.He was born at Tveter farm in Asker as a son of Bent Holtsmark and his wife Anne Elisabeth Gabrielsen. He was a brother of Bernt and Wilhelm Holtsmark...

 and Wilhelm Holtsmark. Both Bernt and Torger were members of the Parliament of Norway.

In April 1893 in Kristiania he married Margrete Weisse, and through her he was a son-in-law of professor Johan Peter Weisse
Johan Peter Weisse
-Personal life:He was born in Fluberg as a son of physician Joachim Frederik Weisse and his wife Grethe Fleischer. His grandfather had migrated to Norway from Brandenburg. The family moved to Trondhjem in 1833....

. He had two sons and three daughters; Johan Peter Holtsmark
Johan Peter Holtsmark
Johan Peter Holtsmark was a Norwegian physicist, who studied spectral line broadening and electron scattering. In 1929, while at the Norwegian Institute of Technology , Holtsmark established acoustics research laboratories, focusing on architectural acoustics and sound insulation...

 and Anne Holtsmark
Anne Holtsmark
Anne Elisabeth Holtsmark was a Norwegian philologist.-Personal life:She was born in Kristiania, the second of five children of Gabriel Gabrielsen Holtsmark and Margrete Weisse , and grew up in Kristiania and Ås...

 became professors and Karen Holtsmark
Karen Holtsmark
-Personal life:She was born in Ås as a daughter of educator and physicist Gabriel Gabrielsen Holtsmark and his wife Margrete Weisse . She was a maternal granddaughter of philologist Johan Peter Weisse, and a paternal granddaughter of agriculturalist and politician Bent Holtsmark...

 became a notable painter. A third daughter Marie eventually took over the family farm Holtsmark in Lier
Lier, Norway
Lier is an affluent municipality in Buskerud county, Norway. The administrative centre of the municipality is the village of Lier. The municipality of Lier was established on 1 January 1838...

, as former owner Torger Holtsmark had no children.

Career

He finished his secondary education in 1885, and took the teacher's education in 1892. He worked as a teacher from 1889 to 1901, and wrote several textbooks: Lærebog i fysik in 1898, Naturlære for middelskolen in 1905 with Daniel Isaachsen, and Lærebog i fysik for realgymnasiet og tekniske skoler in 1909. From 1899 to 1901 he edited the education periodical Den høiere skole. From 1901 to 1902 he spent time at the University of Würzburg
University of Würzburg
The University of Würzburg is a university in Würzburg, Germany, founded in 1402. The university is a member of the distinguished Coimbra Group.-Name:...

, studying under Wilhelm Wien
Wilhelm Wien
Wilhelm Carl Werner Otto Fritz Franz Wien was a German physicist who, in 1893, used theories about heat and electromagnetism to deduce Wien's displacement law, which calculates the emission of a blackbody at any temperature from the emission at any one reference temperature.He also formulated an...

. In 1902 Holtsmark delivered his doctoral thesis, which bore the name Eine Methode für die Intensitätsmessung von Röntgenstrahlen nebst einer Berechnung der Wellenlänge derselben. He returned to Norway the same year, and was hired at the Norwegian College of Agriculture.

From 1910 he was an actuary
Actuary
An actuary is a business professional who deals with the financial impact of risk and uncertainty. Actuaries provide expert assessments of financial security systems, with a focus on their complexity, their mathematics, and their mechanisms ....

 in the insurance company Livsforsikringsselskapet Fram. In 1920 he became the director of the business secondary school Kristiania Commerce School
Oslo Commerce School
Oslo Commerce School is a public high school in Oslo, Norway, specialized to teach financial and business management....

. From 1920 to 1923 he was also a member of the National Price Council. He died in 1954.
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