Heinrich's mother, Luise Therese Sophie, died in 1831, when Heinrich was nine years old.

* 1831 – Heinrich von Stephan, German labor organizer ( d. 1897 )

Heinrich Anton de Bary ( 26 January 1831 – 19 January 1888 ) was a German surgeon, botanist, microbiologist, and mycologist ( fungal systematics and physiology ).

In 1831, the German pharmacist Heinrich F. G. Mein ( 1799-1864 ) succeeded in preparing atropine in pure crystalline form.

Moritz Daniel Oppenheim Heinrich Heine, 1831, Kunsthalle Hamburg

His son Heinrich Ludwig Planck ( 1785 – 1831 ), also professor of theology at Göttingen, published Bemerkungen über den ersten Brief an den Timotheus ( 1808 ) and Abriss d. philos.

* Heinrich Friedrich Karl vom und zum Stein ( 1757 – 1831 ), Prussian statesman

Heinrich von Stephan ( January 7, 1831 – April 8, 1897 ) was a general post director for the German Empire who reorganized the German postal service.

Westphal is not to be confused with Johann Heinrich Westphal ( 1794 – 1831 ).

Johann Heinrich Westphal ( January 31, 1794 – 1831 ) was a German astronomer.

In 1831, work was continued there by the other cofounders Wilhelm Middendorf and Heinrich Langethal.

* Heinrich von Stephan ( 1831 – 1897 ), in 1868 by King Wilhelm I of Prussia

His Christkatholische Dogmatik was published, from his lectures, after his death, by two of his students, Johann Heinrich Achterfeldt and Joseph Braun ( 5 vols, 1831 – 1834 ).

* Heinrich Anton de Bary ( 1831 – 1888 ), German scientist.

Heinrich Friedrich Karl Reichsfreiherr vom und zum Stein ( 25 October 1757 – 29 June 1831 ), commonly known as Baron vom Stein, was a Prussian statesman who introduced the Prussian reforms that paved the way for the unification of Germany.

Henry Suso ( also called Amandus, a name adopted in his writings, and Heinrich Seuse in German ) was a German mystic, born at Überlingen on Lake Constance on 21 March c. 1300 ; he died at Ulm on 25 January 1366 ; declared Blessed in 1831 by Gregory XVI, who assigned his feast in the Dominican Order to 2 March.

A sixth edition was published under Heinrich Friedrich Link and Albert Dietrich in two volumes in 1831 – 1833.

His interest in the ideas of Johann Heinrich Pestalozzi was not welcome at Dickinson, and he resigned his professorship in 1831, and began working on behalf of the Owenites.

When the family moved into the house in 1831, Heinrich Escher was able to devote himself fully to his passion for botany and his entomological collection.

* Johann Heinrich Westphal ( 1794 – 1831 ), German astronomer

It was there that their first child, a daughter they named Anna Bronson Alcott, was born on March 16, 1831, after 36 hours of labor.

The couple's only son was born on April 6, 1831, but lived only a few minutes.

Following the 1831 Nat Turner slave rebellion, a state convention was called to pass a new constitution, including provisions to disfranchise free people of color.

The Sanskrit text was printed at Calcutta in 1831.

Around 1831, when Anne was eleven, she and Emily broke away from Charlotte and Branwell to create and develop their own fantasy world, Gondal.

Anne was particularly close to Emily especially after Charlotte's departure for Roe Head School, in January 1831.

* Ioannis Kapodistrias, the first leader of free modern Greece ( 1776 – 1831 ), had a large building erected ; intended as a barracks, it was subsequently used as a museum, a library and a school.

In 1831, the Navy Board was abolished as a separate entity and its duties and responsibilities were given over to the Admiralty.

As another consequence of the disturbances, a new constitution was accepted in 1831 which came into effect on 4 September of that year.

The phylum was originally called " Polyzoa ", but this term was superseded by " Bryozoa " in 1831.

The cell nucleus was discovered by Robert Brown in 1831.

From 1831 to 1841, Palestine was under the rule of the Muhammad Ali Dynasty of Egypt.

The extension, the East Wing, was completed by 1831.

Work was also progressing on the northern half of the West Wing ( The Egyptian Sculpture Gallery ) 1826 – 1831, with Montagu House demolished in 1842 to make room for the final part of the West Wing, completed in 1846, and the South Wing with its great colonnade, initiated in 1843 and completed in 1847, when the Front Hall and Great Staircase were opened to the public.

In 1831, a legislative assembly was established by local consent at a meeting of principal inhabitants held at Pedro St. James Castle on December 5 of that year.

From May 1827 to September 1831, with the exception of brief interventions by Freire, the presidency was occupied by Francisco Antonio Pinto, Freire's former vice president.

The first Portalian president was General Joaquín Prieto, who served two terms ( 1831 – 1836, 1836 – 1841 ).

Carl Philipp Gottfried von Clausewitz (; July 1, 1780 – November 16, 1831 ) was a Prussian soldier and military theorist who stressed the moral ( in modern terms, " psychological ") and political aspects of war.

The nucleus was also described by Franz Bauer in 1804 and in more detail in 1831 by Scottish botanist Robert Brown in a talk at the Linnean Society of London.

The Baptist chapel was built in 1831.

** Józef Chlopicki was styled Dictator from 5 December 1830-December 1830 and again in December 1830-25 January 1831

In 1831 he published a short popular account of the philosopher's life in Murray's Family Library ; but it was not until 1855 that he was able to issue the much fuller Memoirs of the Life, Writings and Discoveries of Sir Isaac Newton, a work which embodied the results of more than 20 years ' investigation of original manuscripts and other available sources.