Vocation : Science : Chemistry

Ferdinand Karl Franz Schaum (14 July 1870, Frankfurt am Main – 30 January 1947, Gießen) was a German chemist who specialized in the field of photochemistry.
He studied mathematics and sciences at the Universities of Basel, Berlin, Leipzig and Marburg, earning his doctorate at the latter institution in 1893. Afterwards, he served as an assistant to Theodor Zincke at Marburg and to Wilhelm Ostwald in Leipzig. In 1897 he obtained his habilitation at Marburg with a thesis on types of isometry.In 1904 he became an associate professor of physical chemistry at the University of Marburg, where he was an important influence towards the career of chemist Max Volmer. In 1908 he relocated to the University of Leipzig as an associate professor of photochemistry and scientific photography. From 1914 to 1935 he worked as a full professor of physical chemistry at the University of Giessen.Schaum was a member of the Gesellschaft zur Beförderung der gesamten Naturwissenschaften Marburg.

Jacques Rose Ferdinand Émile Sarrau (Perpignan 24 June 1837 – Saint-Yrieix 10 May 1904) was a French chemist. He worked most of his career at the laboratory in the Dépôt Central des Poudres et Salpêtres (Central Depot for Powder and Saltpetre). He did research on explosive shock waves, the effects of explosives and he developed new explosives. The Mach number was sometimes called in French the Nombre de Sarrau (Sarrau number).

Otto Ruff (12 December 1871 – 17 September 1939) was a German chemist.

Giuseppe Oddo (9 June 1865 – 5 November 1954) was an Italian chemist. The Oddo–Harkins rule is named after him and William Draper Harkins. He published his findings in 1914 in a German journal.

Charles Achille Müntz (10 August 1846 – 20 February 1917) was a French agricultural chemist.

Louis Henri Frédéric Melsens (11 July 1814 in Leuven – 20 April 1886 in Brussels) was a Belgian physicist and chemist. In 1846, he became professor of chemistry at the Royal Veterinary School of Cureghem in Anderlecht, Brussels. Melsens applied the principle of the Faraday cage to lightning conductors and invented tincture of iodine for disinfection. In medical circles he became internationally famous for his research on oral administration of potassium iodide as a cure for mercury or lead poisoning.

Arthème Camille Matignon (French pronunciation: [kamij matiɲɔ̃]; 3 January 1867 – 18 March 1934) was a French chemist noted for his work in thermochemistry. He was a member of the Académie des Sciences, President of the French Chemical Society and an honorary Fellow of the British Chemical Society.

Cornelis Adriaan Lobry van Troostenburg de Bruyn (1 January 1857 – 23 July 1904) was a chemist from the Netherlands.

Laurent-Guillaume de Koninck (3 May 1809 – 16 July 1887) was a Belgian palaeontologist and chemist, born at Leuven.
He studied medicine in the university of his native town, and in 1831 he became assistant in the chemical schools. He pursued the study of chemistry in Paris, Berlin and Gießen, and was subsequently engaged in teaching the science at Ghent and Liège. In 1856 he was appointed professor of chemistry in the Liège University, and he retained this post until the close of his life.About the year 1835 he began to devote his leisure to the investigation of the Carboniferous fossils around Liège, and ultimately he became distinguished for his researches on the palaeontology of the Palaeozoic rocks, and especially for his descriptions of the molluscs, brachiopods, crustaceans and crinoids of the Carboniferous limestone of Belgium. In recognition of this work the Wollaston medal was awarded to him in 1875 by the Geological Society of London, and in 1876 he was appointed professor of palaeontology at Liège. In 1882, he was elected as a member to the American Philosophical Society.He was awarded the Clarke Medal by the Royal Society of New South Wales in 1886.Publications:

Eléments de chimie inorganique (1839)
Description des animaux fossiles qui se trouvent dans le terrain Carbonifère de Belgique (1842–1844, supp. 1851)
Recherches sur les animaux fossiles (1847, 1873)See Notice sur LG de Koninck, by E Dupont; Annuaire de l'Aced. roy. de Belgique (1891), with portrait and bibliography.

Étienne-Ossian Henry (27 November 1798 in Paris – 26 August 1873) was a French chemist, son of Noël-Étienne Henry (1769–1832), and trained by his father, who was director of the Central Pharmacy of the Parisian hospitals and professor in the School of Pharmacy. In 1824, he became director of the chemical laboratory of the Academy of Medicine. He discovered sinapin and studied mineral waters, the milk of various animals, nicotine, and tannin. In 1827, with Auguste-Arthur Plisson, who had studied under his father, he discovered aspartic acid.In 1845, he invented the first true burette for titration, which is a widely used device in analytical chemistry and related fields.His son was Emmanuel-Ossian Henry (1826-1867).