Portal:History of science/Selected anniversaries/January 19

January 19:

 * 1833 - Birth of Alfred Clebsch, German mathematician (d. 1872)


 * 1851 - Birth of Jacobus Kapteyn, Dutch astronomer (d. 1922)


 * 1869 - Death of Carl Reichenbach, German chemist and philosopher (b. 1788)


 * 1878 - Death of Henri Victor Regnault French physicist and chemist (b. 1810)


 * 1883 - The first electric lighting system employing overhead wires, built by Thomas Edison, begins service at Roselle, New Jersey


 * 1908 - Birth of Aleksandr Gennadievich Kurosh, Russian mathematician (d. 1971)


 * 1915 - Georges Claude patents the neon discharge tube for use in advertising


 * 1954 - Death of Theodor Kaluza, German scientist (b. 1885)