First female chemist to work for the U.S. Geological Survey; also recruited to work on the Manhattan Project

50th Anniversary: Death of Margaret D. Foster

150th Birthday: Sir William Jackson Pope
British chemist and crystallographer known for his work on optically active N, S, Se, or Sn compounds

100th Birthday: Peter D. Mitchell
Chemistry Nobel Laureate discovered the primary mechanism of ATP synthesis

90th Anniversary: Death of Joseph Achille Le Bel
French chemist and co-discoverer of the basic concepts of organic stereochemistry

100th Birthday: Rosalind Franklin
British chemist and X-ray crystallographer made important contributions to understanding the structure of DNA

100th Anniversary: Death of Ludwig Gattermann
German chemist known for the Gattermann reaction

125th Birthday: William Giauque
Chemistry Nobel Laureate worked on thermodynamics and cryogenics

125th Anniversary: Death of Lothar Meyer
German chemist and physician developed one of the first periodic tables of chemical elements

350th Anniversary: Death of Johann Rudolph Glauber
Seventeenth century alchemist and apothecary considered one of the earliest chemical engineers

100th Anniversary: Death of Carl Alexander von Martius
German chemist developed important, industrially used dyes