1746 In Science

Chemistry

• John Roebuck invents the lead-chamber process for the manufacture of sulphuric acid
• German chemist Andreas Sigismund Marggraf (1709-1782) is credited with describing zinc as a separate metal

Geology

• Jean Etienne Guettard presents the first mineralogical map of France to the French Academy of Sciences

Mathematics

• Jean le Rond d'Alembert develops the theory of complex numbers

Awards

• Copley Medal: Benjamin Robins

Births

• March 7 - Andr Michaux, French botanist (died 1802)
• May 10 - Gaspard Monge, mathematician (died 1818)
• July 7 - Giuseppe Piazzi, astronomer (died 1826)
• Giovanni Battista Venturi, Italian physicist after whom the Venturi tube was named (died 1822)

Deaths

• June 14 - Colin Maclaurin, Scottish mathematician (born 1698)
• November 14 - Georg Steller, German naturalist (born 1709)

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