to demography. The Swedish government decreed in 1736 that the clergy should maintain registers of all births and deaths in their parishes, and the concept emerged in the Swedish Royal Academy of Sciences that these parish data should be subjected to national analysis. Wargentin was assigned to lead this task nationally in 1754, and subsequently published a number of demographic articles in the Transactions of the Swedish Royal Academy, in particular “Mortaliteten i Sverige, i anledning af Tabell-Verket”. References Biography from Nordisk Familjebok, 2nd Ed. (in Swedish). Wargentins notes on his family, edited and published in the journal Personhistorisk tidskrift 1904, pp. 28–38 (in Swedish). Biographical article on Wargentin from the periodical Svenska Familj-Journalen 1879 (in Swedish). Notes 1717 births 1783 deaths 18th-century Swedish astronomers Uppsala University alumni Members of the Royal Swedish Academy of Sciences Members of the French Academy of Sciences Fellows of the American Academy of Arts and Sciences Fellows of the Royal Society Members of the American Academy of Arts and Letters