Photocopy belonging to Georg Bredig (1868-1944) depicting a spread in an unknown book.

Portrait of W. A. Schmidt taken at Albert Blanck's studio in Leipzig, Germany.

Leather passport holder belonging to Max Albert Bredig (1902-1977).

Portrait of Max Planck (1858-1947). Max Planck is known as the father of quantum theory. He won the Nobel Prize in Physics in 1918 for his discovery of energy quanta. Planck made significant contributions to the world…

Sepia toned photograph of H. Jermain Creighton. The lower right has a note from Creighton to Georg Bredig (1868-1944).

Creighton was the head of the chemistry department at Swarthmore College, Pennsylvania in 1928. He…

Black and white portrait of Friedrich Kohlrausch (1840 -1910).

Kohlrausch was a German experimental physicist who researched electrolytes, elasticity, thermal conduction, and magnetic and electrical precision…

Blank postcard featuring a black and white photograph of two men using an electrical oven, invented by Henri Moissan (1852 - 1907), at La Sorbonne, University of Paris.

Diagram of an experimental arrangement for demonstration in the lecture: oxidation of atmospheric nitrogen in the high-voltage arc according to the Pauling system.

Portrait of William Thomson, 1st Baron Kelvin (1824-1907). William Thomson was a British mathematician, physicist, and engineer. He became Baron Kelvin in 1892 and the first British scientist to be elevated to the…

Friedrich Wöhler (1800 -1882) was a German chemist and professor of chemistry at the University of Göttingen. He specialized in inorganic chemistry and was the first scientist to isolate beryllium and yttrium in pure…

Black and white printed portrait of August Friedrich Horstmann (1842-1929), a German physical chemist who worked in the field of thermodynamics.

Letter from Gesellschaft Deutscher Naturforscher und Ärzte (in English, the Society of German Natural Scientists and Physicians). The society was founded in 1822 and is the oldest extant scientific association in…

Undated financial documents belonging to Max Albert Bredig (1902-1977).

Advertisement for a chemical dictionary in German, English, and French by A.W. Mayer, collected by Georg Bredig (1868-1944). The booklet was published by Verlag von Otto Spamer in Leipzig, Germany.

Metal plaque of Wilhelm Ostwald (1853-1932) in a fabric-covered picture frame. Ostwald is shown in profile. On the back of the frame is a handwritten note.

Ostwald was a German chemist and philosopher. In 1909, he…

Booklet from Gesellschaft für Linde's Eismaschinen AG, a gas and engineering and materials handling company owned by Carl von Linde (1842-1934).

Svante Arrhenius' (1859-1927) personal calling card on which Arrhenius has wished Georg Bredig (1868-1944) a Happy New Year.