Frederick Augustus Ludwig Karl Wilhelm Genth (May 17, 1820 – February 2, 1893) was a German-American

chemist A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. Chemists carefully describe th ...

, specializing in analytical chemistry and mineralogy.

Biography

Frederick Augustus Genth was born in

Wächtersbach The town of Wächtersbach is part of the Main-Kinzig-Kreis in Hesse, Germany. In 1982, the town hosted the 22nd ''Hessentag'' state festival. Location Wächtersbach lies between the Spessart and the Vogelsberg Mountains in the middle Kinzig val ...

Hesse-Cassel The Landgraviate of Hesse-Kassel (german: Landgrafschaft Hessen-Kassel), spelled Hesse-Cassel during its entire existence, was a state in the Holy Roman Empire that was directly subject to the Emperor. The state was created in 1567 when the Lan ...

on May 17, 1820. He studied at the

Hanau Hanau () is a town in the Main-Kinzig-Kreis, in Hesse, Germany. It is located 25 km east of Frankfurt, Frankfurt am Main and is part of the Frankfurt Rhine-Main, Frankfurt Rhine-Main Metropolitan Region. Its Hanau Hauptbahnhof, station is a ...

gymnasium and at the

University of Heidelberg } Heidelberg University, officially the Ruprecht Karl University of Heidelberg, (german: Ruprecht-Karls-Universität Heidelberg; la, Universitas Ruperto Carola Heidelbergensis) is a public research university in Heidelberg, Baden-Württemberg, ...

, under

Justus von Liebig Justus Freiherr von Liebig (12 May 1803 – 20 April 1873) was a German scientist who made major contributions to agricultural and biological chemistry, and is considered one of the principal founders of organic chemistry. As a professor at t ...

Giessen Giessen, spelled Gießen in German (), is a town in the German state (''Bundesland'') of Hesse, capital of both the district of Giessen and the administrative region of Giessen. The population is approximately 90,000, with roughly 37,000 univers ...

, and finally under Christian Gerling (physics) and

Robert Bunsen Robert Wilhelm Eberhard Bunsen (; 30 March 1811 – 16 August 1899) was a German chemist. He investigated emission spectra of heated elements, and discovered caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff. The Bu ...

(chemistry) at

Marburg Marburg ( or ) is a university town in the German federal state (''Bundesland'') of Hesse, capital of the Marburg-Biedenkopf district (''Landkreis''). The town area spreads along the valley of the river Lahn and has a population of approximate ...

, where he received the degree of

Ph.D. A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is ...

in 1846. For three years (1845-1848) he acted as assistant to Bunsen. In 1848, Genth emigrated to the United States. He settled in Philadelphia and organized an analytical laboratory. In 1872 he was appointed professor of chemistry and

mineralogy Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the proces ...

in the

University of Pennsylvania The University of Pennsylvania (also known as Penn or UPenn) is a private research university in Philadelphia. It is the fourth-oldest institution of higher education in the United States and is ranked among the highest-regarded universitie ...

. He resigned his professorship in 1888, and re-established his laboratory. He also held the office of chemist to the Geological Survey of Pennsylvania and also to the board of agriculture of that state. Genth was a member of many scientific societies in the United States: he was elected in 1872 to membership in the

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...

; he was a member of the

American Philosophical Society The American Philosophical Society (APS), founded in 1743 in Philadelphia, is a scholarly organization that promotes knowledge in the sciences and humanities through research, professional meetings, publications, library resources, and communit ...

(elected 1886), one of the founders of the

American Chemical Society The American Chemical Society (ACS) is a scientific society based in the United States that supports scientific inquiry in the field of chemistry. Founded in 1876 at New York University, the ACS currently has more than 155,000 members at all d ...

, and its president in 1880, and a fellow of the Boston Academy of Arts and Sciences.

Benjamin Silliman, Jr. Benjamin Silliman Jr. (December 4, 1816 – January 14, 1885) was a professor of chemistry at Yale University and instrumental in developing the oil industry. His father Benjamin Silliman Sr., also a famous Yale chemist, developed the process of ...

, alluded to Genth as having "no superior in this country as an analytical chemist."

Publications

Genth contributed many and careful analyses of minerals to the literature of chemistry. His name is associated with the ammonia cobalt bases which he discovered in 1846, and, in joint authorship with

Wolcott Gibbs Wolcott Gibbs (March 15, 1902 – August 16, 1958) was an American editor, humorist, theatre critic, playwright and writer of short stories, who worked for ''The New Yorker'' magazine from 1927 until his death. He is notable for his 1936 parody o ...

(1822-1908), he contributed to the "Smithsonian Contributions to Knowledge" a monograph on "Researches on the Ammonia-Cobalt Bases" (Washington, 1856). Genth is the author of 102 separate papers on subjects in chemistry and mineralogy. Of these, about 30 were not related to mineralogy. Among the non-mineralogical papers were papers on fertilizers, which were related to his work for the Pennsylvania Board of Agriculture. He also published "Tabellarische Übersicht der wichtigsten Reactionen welche Basen in Salzen zeigen" (Marburg, 1845), also the same in relation to "Acids" (1845); "Corundum" (in ''American Philosophical Society Proceedings'', 1873); "Minerals of North Carolina," being appendix "C" of the ''Report on the Geology of North Carolina'' (Raleigh, 1875); also ''First and Second Preliminary Reports on the Mineralogy of Pennsylvania'' (Harrisburg, 1875/6), and ''Minerals and Mineral Localities of North Carolina'' (Raleigh, 1881).

Minerals discovered and characterized

Genth was first to describe and characterize a number of new minerals, often ores of

tellurium Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally fou ...

. Among those still recognized today are:

melonite Melonite is a telluride of nickel; it is a metallic mineral. Its chemical formula is NiTe2. It is opaque and white to reddish-white in color, oxidizing in air to a brown tarnish. It was first described from the Melones and Stanislaus mine in ...

calaverite Calaverite, or gold telluride, is an uncommon telluride of gold, a metallic mineral with the chemical formula AuTe2, with approximately 3% of the gold replaced by silver. It was first discovered in Calaveras County, California in 1861, and was ...

, cosalite, schirmerite,

coloradoite Coloradoite, also known as mercury telluride (HgTe), is a rare telluride ore associated with metallic deposit (especially gold and silver). Gold usually occurs within tellurides, such as coloradoite, as a high-finess native metal. The quest for ...

, montanite, kerrite, maconite, willcoxite, dudleyite, endlichite, landsfordite,

nesquehonite Magnesium carbonate, (archaic name magnesia alba), is an inorganic salt that is a colourless or white solid. Several hydrated and basic forms of magnesium carbonate also exist as minerals. Forms The most common magnesium carbonate forms are t ...

phosphuranylite Phosphuranylite is a uranyl phosphate mineral with formula KCa(H3O)3(UO2)7(PO4)4O4·8(H2O). It was first described in 1879 by Frederick Augustus Genth, from an occurrence in the Flat Rock pegmatite in Mitchell County, North Carolina Mitchell ...

, and

penfieldite Penfieldite is a rare lead hydroxychloride mineral from the class of halides. It was named after Samuel Lewis Penfield. It has been a valid species before the founding of IMA, and was first published in 1892. It had been grandfathered, meaning ...

Family

He married twice, the first time to Karolina Jäger (1847), with whom he had three children, the second time to Paulina Fischer (1852), with whom he had nine children. He died in Philadelphia on February 2, 1893.

Notes

References