* 1869 – Hans Poelzig, German architect, painter, and set designer ( d. 1936 )

They were first observed in 1869 by German physicist Johann Hittorf, and were named in 1876 by Eugen Goldstein kathodenstrahlen, or cathode rays.

* 1869 – Friedrich Ernst Scheller, German jurist and politician ( b. 1791 )

* 1869 – Else Lasker-Schüler, German writer ( d. 1945 )

* 1789 – Johann Friedrich Overbeck German painter ( d. 1869 )

* 1813 – Otto Jahn, German archaeologist ( d. 1869 )

* 1869 – Hans Pfitzner, German composer ( d. 1949 )

* 1869 – Carl Schuhmann, German athlete ( d. 1946 )

* 1946 – Carl Schuhmann, German athlete ( b. 1869 )

* 1869 – Helene Stöcker, German feminist, pacifist and publicist ( d. 1943 )

After the First Vatican Council ( 1869 – 1870 ), several groups of Austrian, German and Swiss Catholics rejected the solemn declaration concerning papal infallibility in matters of faith and morals and left to form their own churches.

* January 22 – Else Lasker-Schüler, German poet ( b. 1869 )

* September 12 – Hans Spemann, German embryologist, recipient of the Nobel Prize in Physiology or Medicine ( b. 1869 )

* Paul Behncke, German admiral ( b. 1869 )

* November 30 – Carl Loewe, German composer ( d. 1869 )

** Victor Aimé Huber, German social reformer ( d. 1869 )

Frege matriculated at the University of Jena in the spring of 1869 as a citizen of the North German Federation.

It was initially adopted by the German states in 1865, ( from which point onwards till the middle of WWI approximately 5 % of every bayonet style was issued with a sawback version ) Great Britain in 1869, Belgium in 1868 and Switzerland in 1878, ( who introduced their last model in 1914 ).

They were noticed by Paul Langerhans, a German medical student, in 1869 ; these clusters throughout the pancreas serve several functions.

The General German Workers ' Association ( Allgemeiner Deutscher Arbeiterverein, ADAV ), founded in 1863, and the Social Democratic Workers ' Party ( Sozialdemokratische Arbeiterpartei Deutschlands, SDAP ), founded in 1869, merged in 1875, under the name Socialist Workers ' Party of Germany ( Sozialistische Arbeiterpartei Deutschlands, SAPD ).

In 1869, one hundred years before the Stonewall Riots, the German homosexual rights advocate Karl Heinrich Ulrichs introduced the idea of self-disclosure as a means of emancipation.

The first was the English Alpine Club ( founded in the winter of 1857 – 1858 ), followed in 1862 by the Austrian Alpine Club ( which in 1873 was fused, under the name of the German and Austrian Alpine Club, with the German Alpine Club, founded in 1869 ), in 1863 by the Italian and Swiss Alpine Clubs, and in 1874 by the French Alpine Club, not to mention numerous minor societies of more local character.

Amelia Mary Earhart, daughter of German American Samuel " Edwin " Stanton Earhart ( born March 28, 1867 ) and Amelia " Amy " Otis Earhart ( 1869 – 1962 ), was born in Atchison, Kansas, in the home of her maternal grandfather, Alfred Gideon Otis ( 1827 – 1912 ), a former federal judge, president of the Atchison Savings Bank and a leading citizen in the town.

Shortly after, in 1869, Irish chemist Thomas Andrews studied the phase transition from a liquid to a gas and coined the term critical point to describe the instant at which a gas and a liquid were indistinguishable as phases, and Dutch physicist Johannes van der Waals supplied the theoretical framework which allowed the prediction of critical behavior based on measurements at much higher temperatures.

* 1869 – Charles Wilson, Scottish physicist, Nobel Prize Laureate ( d. 1959 )

* 1786 – Joseph Jackson Lister, English opticist and physicist ( d. 1869 )

* September 24 – John Stone Stone, American physicist and inventor ( b. 1869 )

* November 15 – Charles Thomson Rees Wilson, Scottish physicist, Nobel Prize laureate ( b. 1869 )

* December 9 – Gustaf Dalén, Swedish physicist, Nobel Prize laureate ( b. 1869 )

Originally heated by slow-burning coal, the Aga cooker was invented in 1922 by the Nobel Prize-winning Swedish physicist Gustaf Dalén ( 1869 – 1937 ), who was employed first as the chief engineer of the Swedish AGA company ( Swedish: Aktiebolaget Svenska Gasaccumolator, English: Joint stock company Swedish Gas Accumulator ).

* Gustav Mie ( 1869 – 1957 ), German physicist

* November 15-C. T. R. Wilson ( born 1869 ), Scottish physicist ( Nobel Prize in Physics 1927 )

Louis Day ( 30 October 1869 – 2 March 1960 ) was an American geological physicist.

* Charles Thomson Rees Wilson ( 1869 – 1959 ), Scottish physicist and Nobel Prize winner

* Joseph Jackson Lister ( 1786 – 1869 ), his father, amateur British opticist and physicist

Ernest Fox Nichols ( June 1, 1869 – April 29, 1924 ) was a U. S. educator and physicist.

The Lorentz – Lorenz equation is named after the Danish mathematician and scientist Ludvig Lorenz, who published it in 1869, and the Dutch physicist Hendrik Lorentz, who discovered it independently in 1878.

Gustav Adolf Feodor Wilhelm Ludwig Mie ( 29 September 1869 – 13 February 1957 ) was a German physicist.

* Joseph Jackson Lister ( 1786 – 1869 ), British amateur opticist and physicist ; father of Joseph Lister

Sergey Alexeyevich Chaplygin (; April 5, 1869, Ranenburg – October 8, 1942, Novosibirsk ) was a Russian and Soviet physicist, mathematician, and mechanical engineer.

John Stone Stone ( September 24, 1869 – May 20, 1943 ) was an American mathematician, physicist and inventor.