Scientist associated with Avogadro's law. Authentic institutional portrait: Science History Institute portrait record.
Chemist and scientific writer. Authentic portrait: Smithsonian Libraries portrait record.
Chemistry educator and author of The Iodine Test for Reducing Sugars by Holger Fleischer. The publisher identifies the author with Scheffold-Gymnasium, Schwäbisch Gmünd: www.sciepub.com/WJCE/abstract/10312. The chemical educator is distinct from the legal scholar with the same name.
Chemist whose 1856 formic acid preparation used oxalic acid and glycerol. Authentic museum portrait: www.parismuseescollections.paris.fr/en/node/1056491.
Chemist associated with Fehling's reagent. Authentic external portrait: commons.wikimedia.org/wiki/File:Hermann_fehling.jpg.
A chemist who developed a sensitive arsenic detection method. External portrait: Portrait in The Records of the Woolwich District, volume 1, p.340.
Verified external portrait reference: Portrait or portrait collection identifying the sitter.
Verified external portrait reference: Portrait or portrait collection identifying the sitter.
Verified external portrait reference: Portrait or portrait collection identifying the sitter.
Verified external portrait reference: Portrait or portrait collection identifying the sitter.
Verified external portrait reference: Portrait or portrait collection identifying the sitter.
Verified external portrait record: digital.sciencehistory.org/works/zb6pn2u/viewer/8nsyo71
A chemist associated with Nessler's reagent. Deutsche Biographie, identity and dates. A verified external portrait appears in University of Cincinnati, Colorimeters booklet, figure 2 on PDF page 3; no standalone portrait URL was established for embedding.
Identity: library.si.edu/image-gallery/73414
Verified external portrait record: library.si.edu/image-gallery/73414
Verified external portrait record: archives.sciencehistory.org/repositories/3/archival_objects/51106
Portrait of Harold Urey
. Portrait from NASA History, photographer not stated on the Commons file page. The file page identifies it as public-domain NASA material. Source.
Portrait of Antoine-François de Fourcroy
. Wellcome Library, London / Wellcome Collection; plate published in A. Corlieu, Centenaire de la Faculté de médecine de Paris (1896). CC BY 4.0, via Wikimedia Commons. Source.
Portrait of Claude Louis Berthollet
. Allais, after Dutertre, after Rembrandt Peale; Wellcome Library, London / Wellcome Collection. CC BY 4.0, via Wikimedia Commons. Source.
Portrait of Louis-Bernard Guyton de Morveau
. Edme Quenedey (engraver); Library of Congress, Tissandier collection. Public domain; Public Domain Mark 1.0. Source and usage information on the linked Wikimedia file page. Source.
Portrait of Antoine Lavoisier
. Johann Friedrich Bolt (1769–1836), engraving dated 1796; reproduced in Biographies of Scientific Men (1912). Public domain: life plus 70 years or fewer; United States publication before 1931. Source usage terms, via Wikimedia Commons. Source.
Chemist whose Experiments and Observations on Different Kinds of Air by Joseph Priestley (1775) describes the investigation of dephlogisticated air.
Portrait of Joseph Priestley
. Ellen Sharples (1769–1849), pastel, 1794–1797; National Portrait Gallery, London, NPG 175; scan of a print. Public domain: life plus 100 years or fewer; United States publication before 1931; faithful 2D reproduction. Source usage terms, via Wikimedia Commons. Source.
Chemist whose Chemical Treatise on Air and Fire by Carl Wilhelm Scheele records independent investigations of oxygen.
Portrait of Carl Wilhelm Scheele
. Ida Falander (1842–1927); turn-of-the-20th-century likeness, sourced by Commons to the Royal Society of Chemistry. Public domain: life plus 70 years or fewer; United States publication before 1930 as stated on File. Source usage terms, via Wikimedia Commons. Source.
Chemist whose investigations included controlled operations on air in a receiver attached to an air pump.
Portrait of Robert Boyle
. Photograph by Eowyn041084, 16 January 2013, of a portrait attributed to Jonathan Richardson (died 1745). CC BY-SA 4.0, via Wikimedia Commons. Source.
Portrait of Paul Flory
. Unidentified Associated Press photographer; press image labeled 1973; existing 3:4 crop by Materialscientist. Public domain in the United States: publication without copyright notice, 1931–1977. Source usage terms, via Wikimedia Commons. Source.
Portrait of Victor Goldschmidt
. Unknown author; Oslo Museum, image no. OB.F05887a. CC BY-SA 4.0, via Wikimedia Commons. Source.
Portrait of George M. Whitesides
. Douglas A. Lockard; Science History Institute; Heritage Day, Philadelphia, 9 May 2007. CC BY-SA 3.0, via Wikimedia Commons. Source.
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