1888) August 9 – Guido Gozzano, Italian poet and writer (b. 1883) August 10 – S. Isadore Miner, American columnist writing as "Pauline Periwinkle" (b. 1863) August 13 – Pierre de Ségur, French historian (b. 1853) August 17 – Umberto Boccioni, Italian painter and sculptor (b. 1882) August 18 – Marcel Brindejonc des Moulinais, French aviator (b. 1892) August 30 – Alexander Boarman, American judge, U.S. House of Representatives of Louisiana (b. 1839) August 31 Martha McClellan Brown, American activist (b. 1838) John St. John, American temperance leader and Governor of Kansas (b. 1833) September September 2 Gennady Ladyzhensky, Russian painter (b. 1852) Felipe Trigo, Spanish writer (b. 1864) September 4 – José Echegaray, Spanish writer, Nobel Prize laureate (b. 1832) September 7 – Annie Le Porte Diggs, Canadian-born American activist and librarian (b. 1853) September 8 Friedrich Baumfelder, German composer, conductor, and pianist (b. 1836) James Gray, American journalist, 19th Mayor of Minneapolis (b. 1862) September 12 – Zygmunt Balicki, Polish sociologist (b. 1858) September 14 – Pierre Duhem, French physicist (b. 1861) September 15 Raymond Asquith, English barrister (b. 1878) Josiah Royce, American philosopher (b. 1855) September 17 – Seth Low, American politician and educator, Mayor of New York City (b. 1850) September 25 – Gerald Arbuthnot, British soldier and politician (b. 1872) September 29 – Albert John Cook, American entomologist and zoologist (b. 1842) October October 3 James Burgess, British archaeologist (b. 1832) Dmytro Yaremko, Ukrainian Eastern Catholic hierarch and bishop (b. 1879) October 6 – Isidore De Loor, Belgian Roman Catholic religious professed and blessed (b. 1881) October 10 – Antonio Sant'Elia, Italian architect (killed in action) (b. 1888) October 11 – King Otto of Bavaria (b. 1848) October 12 – Tony Jannus, American aviator and aircraft designer (b. 1889) October 18 – Ignacio Pinazo Camarlench, Spanish painter (b. 1849) October 21 Olindo Guerrini, Italian poet (b. 1845) Karl von Stürgkh, Prime Minister of Austria (b. 1859) October 25 – Gérard Encausse, Papus, French occultist (b. 1865) October 28 Oswald Boelcke, German World War I fighter ace, (b. 1891) Cleveland Abbe, American meteorologist (b. 1838) October 29 – John Sebastian Little, American politician and congressman (b. 1851) October 31 Tina Blau, Austrian painter (b. 1845) Charles Taze Russell, Protestant evangelist, forerunner of Jehovah's Witnesses (b. 1852) Huang Xing, Chinese revolutionary leader and politician, and the first commander-in-chief of the Republic of China (b. 1874) November November