1869 in science

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The year 1869 in science and technology involved some significant events, listed below.

Events

• November 4 - The first issue of scientific journal Nature is published in London, edited by Norman Lockyer.

Chemistry

Mendeleev's 1869 periodic table

• Dmitri Mendeleev makes a periodic table.
• Publication of Adolphe Wurtz's Dictionnaire de chimie pure et appliquée begins in Paris.

Life sciences

• Paul Langerhans discovers the islets of Langerhans in the pancreas.
• Friedrich Miescher discovers deoxyribonucleic acid (DNA) in the pus of discarded surgical bandages. Found in the nuclei of cells, Miescher names it "nuclein".
• Alfred Russell Wallace publishes The Malay Archipelago.

Mathematics

• W. Stanley Jevons publishes The Substitution of Similars and has a "Logic Piano" constructed to work out problems in symbolic logic.

Awards

• Copley Medal: Henri Victor Regnault
• Wollaston Medal for Geology: Henry Clifton Sorby

Births

• February 14 - C. T. R. Wilson (d. 1959), Scottish winner of the Nobel Prize in Physics.
• April 8 - Harvey Cushing (d. 1939), American neurosurgeon.
• August 23 - Robert Gunther (d. 1940), English historian of science.
• October 3 - Robert W. Paul, (d. 1943), English pioneer of cinematography.

Deaths

• July 22 - John A. Roebling (b. 1806), German American bridge engineer.
• September 11 - Thomas Graham (b. 1805), Scottish chemist.