1830 births

Oscar Pletsch (26 March 1830 – 12 January 1888) was a German illustrator.

Stéphen François Emile Liégeard (29 March 1830 – 29 December 1925) was a French lawyer, administrator, deputy, writer and poet. He gave the name "Côte d'Azur" (Azure Coast) to the French Riviera.

Christoph von Sigwart (28 March 1830 – 4 August 1904) was a German philosopher and logician. He was the son of philosopher Heinrich Christoph Wilhelm Sigwart (31 August 1789 – 16 November 1844).

Albert Karl Ludwig Gotthilf Günther , also Albert Charles Lewis Gotthilf Günther (3 October 1830 – 1 February 1914), was a German-born British zoologist, ichthyologist, and herpetologist. Günther is ranked the second-most productive reptile taxonomist (after George Albert Boulenger) with more than 340 reptile species described.

Félix Thyes (19 January 1830 – 8 May 1855) was a Luxembourg writer. He is recognized as the first Luxembourg author to write a novel in French. Marc Bruno, profil d'artiste was published shortly after his death in 1855. He was also the first literary historian to discuss literature written in Luxembourgish.

Louis Xavier Édouard Léopold Ollier (French: [ɔlje]; 2 December 1830 – 26 November 1900) was a French surgeon, known for his pioneering work in reconstructive surgery and orthopedics.

Henri Legrand du Saulle (Dijon, 16 April 1830 – Paris, 5 May 1886) was a French psychiatrist.
As a young man he worked as an assistant to Bénédict Morel (1809–1873) at Saint-Yon, and also served under Louis-Florentin Calmeil (1798–1895) at the Charenton Asylum. In 1856 became a doctor to the medical faculty in Paris. Later on, he was appointed physician at the Bicêtre Hospital (replacing Prosper Lucas 1805–1885), and in 1879 succeeded Louis Delasiauve (1804–1893) as chief physician in the department for epileptics at Salpêtrière Hospital. During his career he was also associated with the Prefecture of Police, serving from 1863 as médecin-adjoint to Charles Lasègue (1816–1883).He is known for his studies on personality disorders, particularly pioneer work involving phobias and obsessive-compulsive disorders. He also performed extensive work in forensic psychiatry, being interested with the medical-judicial aspects of psychopathology.

Pierre Paul Dehérain (19 April 1830 in Paris – 7 December 1902) was a French plant physiologist and agricultural chemist. He was notably the doctoral advisor of the Nobel Prize winner Henri Moissan.
He served as an assistant at the Conservatoire national des arts et métiers in Paris, then at the age of 26, began work as a professor at the Collège Chaptal. He obtained his LSc degree in 1856 under Edmond Frémy. Later on, he taught classes in agricultural chemistry at the agricultural school in Grignon, and in 1880, became a professor of plant physiology at the Muséum d'Histoire Naturelle. In 1887 he was elected a member of the Académie des sciences.As a plant physiologist, he studied the absorption of carbon dioxide by plants and the effect of artificial light, especially ultraviolet rays, on plants. He showed that plants do not absorb only those minerals that are beneficial, as previously thought, but absorb all of them and then use those that they need – so that consumption regulates absorption. He discovered respiration by plant roots and investigated the effect of different minerals on the growth of fruits. He also studied effect of crop rotation on soil quality.
The plant genus Deherainia from the family Theophrastaceae is named after him.

François Crépin (30 October 1830 – 30 April 1903) was an important botanist of the 19th century and director of the National Botanic Garden of Belgium.
Crépin was born in Rochefort, Belgium. The genus Crepinella (Araliaceae) is named after him. As a taxonomist he circumscribed numerous plants within the genus Rosa. He died in Brussels.
His Belgian herbarium and his herbier des roses are kept in the collections of the Botanic Garden Meise.

Louis Édouard Bureau (25 May 1830 in Nantes – 14 December 1918 in Paris) was a French physician and botanist.
Édouard Bureau began his medical studies in Nantes in 1848, where he held the post of director of the Muséum de Nantes (Nantes Museum). He completed his medical degree in Paris in 1852. In 1872 he obtained a post as a naturalist assistant at the Muséum national d'histoire naturelle (French National Museum of Natural History) in the laboratory of Adolphe Brongniart, where he replaced Edmond Tulasne. In 1874 he received appointment to the new botany post dealing with classification. Beginning in 1875, he was a director of the herbaria at the museum. He was a professor at the museum from 1874 until he retired in 1905. Adrien Franchet was his assistant in the 80's. He was succeeded by Paul Henri Lecomte.
Bureau was one of the founders of the Société botanique de France (French Botanical Society) and was the chairman in 1875, 1883, 1902 and 1905. In 1895 he was elected to the French Academy of Medicine. From 1895 to 1917, he was a member of the Comité travaux of the historiques et scientifiques (French Committee for Historical and Scientific Endeavors).
Bureau was a significant contributor to Baillon’s Dictionnaire de Botanique (Botanical Dictionary). He wrote the chapters on the Moraceae, including the Artocarpeae (the breadfruit tribe), for volume XVII (1873) of Candolle’s Prodromus systematis naturalis regni vegetabilis (A preliminary natural system for the plant kingdom). Together with Karl Moritz Schumann, he wrote the Bignoniaceae section of Volume VIII of Carl Friedrich Philipp von Martius’s Flora brasiliensis (Flora of Brazil).
Bureau was particularly interested in paleobotany and significantly increased the museum's paleontological holdings. From 1910–1914 he published a two-volume work on the fossils of the Loire basin, and in 1911, he published a further work specifically on the Devonian there.The species Rhododendron bureavii, belonging to the taxonomically complex group of elepidote (nonscaly) rhododendrons, was named in his honor and was based upon specimens from China in his private collection.