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

Personal calling card for Eduard Buchner (1860-1917). Buchner was a German chemist who received the 1907 Nobel Prize in Chemistry for his biochemical research and discovery of cell-free fermentation.

Personal calling card belonging to Friedrich Bergius (1884-1949). Bergius shares the 1931 Nobel Prize in Chemistry with Carl Bosch (1874-1940) for their work pioneering high-pressure chemistry methods.

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…

A Christmas card with a blank cover addressed to Georg Bredig (1868-1944)

A Christmas card featuring a line drawing of the Town Hall of Old Town Dusseldorf, Germany.

Illustration by C. Jensen of a gate located in Sanssouci park, Potsdam Germany. Illustration was gifted from Mariele Krieger to Georg Bredig (1868-1944).

Blank postcard featuring an illustration of a statue of the goddess Athena, created by the early classical sculptor Myron (5th cen., B.C.). The artist cast the original sculpture in bronze with another figure of the…

Blank postcard featuring an illustration of a statue of the goddess Athena, created by the early classical sculptor Myron (5th cen., B.C.). The artist cast the original sculpture in bronze with another figure of the…

Equations for converting degrees Celsius to degrees Fahrenheit

List of conversions from the imperial system to the metric system