Hermann Franz Moritz Kopp (1817–92) was a German physical chemist and historian of chemistry. Kopp is well-known for his four volume work, Geschichte der Chemie (History of Chemistry), which was published between…

Portrait of Hendrik Antoon Lorentz (1853-1902) wearing a suit and a bow tie.

Lorentz was a Dutch physicist. In 1902, he was awarded the Nobel Prize in Physics with Pieter Zeeman (1865-1943) for their discovery of the…

Portrait of Hans Luggins (1863-1899), taken by Anna Edlund in Stockholm, Sweden.

Portrait of Hans Heinrich Landolt (1831-1910). Landolt was a Swiss chemist who discovered the iodine clock reaction. He was additionally a co-founder of the Landolt–Börnstein database.

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…

Postcard featuring a photograph of Gustav Heinrich Johann Apollon Tammann (1861-1938). Tammann was a Baltic German physical chemist. He worked in the fields of metallurgy and studied the physical properties of metals…

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 portrait of Friedrich Kohlrausch (1840 -1910).

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

Portrait of Ernst Mach (1838 -1916) an Austrian physicist and philosopher.

Portrait of Ernst Cohen (1869-1944), a Dutch scientist and professor, who was known for his research in the allotropy of tin. Cohen worked under Svante Arrhenius (1859-1927), Henri Moissan (1852-1907), and Jacobus van…

Carl Wilhelm Scheele (1742-1786) was a German-Swedish pharmaceutical chemist whose discoveries include oxygen and chlorine gas.

Carl Wilhelm Scheele (1742-1786) was a German-Swedish pharmaceutical chemist whose discoveries include oxygen and chlorine gas.

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

Porcelain mortar owned by Georg Bredig (1868-1944). Mortar and pestles are used to manually grind or crush a sample into a fine powder.

Sepia-toned photograph of the Scottish village Kinlochleven. Kinlochleven is the home to a gravity dam and water supply system that powered the aluminum production for the British Aluminium Company.

Photographic view of W. W. Taylor reading with a young child outside a farmhouse. The child points to a flock of chickens. A meadow and mountains fill the background. On the back of the photograph is a holiday message…

Personal calling card belonging to Phillippe-Auguste Guye (1862-1922). Guye was a Swiss physical chemist and five-time Nobel Prize nominee. In 1903, Guye started Journal de Chimie Physique, the first Swiss journal of…

Calling card belonging to Paul Jacobson (1859-1923), an organic chemist known for being the general secretary of the German Chemical Society.

Calling card belonging to Otto Schmidt (1891-1956), a Soviet scientist, mathematician, astronomer, geophysicist, statesman, and explorer. Includes a note written to Georg Bredig (1868-1944) by Schmidt.

Calling card for chemical engineer, Otto Küster. Verso includes a note written from Küster to Georg Bredig (1868-1944).