by Jozef Stefan. Wilhelm Wundt establishes the first psychological research laboratory, at the University of Leipzig. Tetteh Quarshie first brings cocoa beans to Ghana from Equatorial Guinea. Gottlob Frege publishes Begriffsschrift, eine der arithmetischen nachgebildete Formelsprache des reinen Denkens in Halle, a significant text in the development of mathematical logic. Births January–March January 1 – E. M. Forster, English writer (d. 1970) January 3 – Grace Coolidge, First Lady of the United States (d. 1957) January 12 – Calbraith Perry Rodgers, American pioneer aviator, makes first transcontinental U.S. flight (d. 1912) January 20 – Ruth St. Denis, American dancer (d. 1968) January 28 Betty Kuuskemaa, Estonian actress (d. 1966) Francis Picabia, French painter, poet (d. 1953) February 6 – Magnús Guðmundsson, 3rd prime minister of Iceland (d. 1937) February 13 – Sarojini Naidu, Indian independence activist and poet (d. 1949) February 20 – Hod Stuart, Canadian professional ice hockey player (d. 1907) February 22 Johannes Nicolaus Brønsted, Danish chemist (d. 1947) Norman Lindsay, Australian painter (d. 1969) February 26 – Frank Bridge, English composer (d. 1941) March 6 – William P. Cronan, 19th Naval Governor of Guam (d. 1929) March 8 – Otto Hahn, German chemist, Nobel Prize laureate (d. 1968) March 14 – Albert Einstein, German-born physicist, Nobel Prize laureate (d. 1955) March 18 – Emma Carus, American opera singer (d. 1927) March 20 – Maud Menten, Canadian biochemist and medical researcher (d. 1960) March 26 – Othmar Ammann, Swiss-born American engineer (d. 1965) March 27 Sándor Garbai, Prime Minister of Hungary (d. 1947) Edward Steichen, Luxembourgeois-born American painter and photographer (d. 1973) April–June April 1 – Mary J. L. Black, Canadian librarian and suffragist (d. 1939) April 9 – Thomas Meighan, American actor (d. 1936) April 11 – Bernhard Schmidt, German-Estonian optician, inventor (d. 1935) April 16 – Gala Galaction, Romanian writer (d. 1961) April 20 Italo Gariboldi, Italian general (d. 1970) Robert Wilson Lynd, Irish essayist, writer (d. 1949) Paul Poiret, French couturier (d. 1944) April 21 – Kartini, Indonesian national heroine, women's rights activist (d. 1904) April 26 – Owen Willans Richardson, British physicist, Nobel Prize laureate (d. 1959) April 29 – Sir Thomas Beecham, English conductor (d. 1961) April 30 – Richárd Weisz, Hungarian Olympic champion wrestler (d. 1945) May 6 – Bedřich Hrozný, Czech orientalist, linguist (d. 1952) May 11 – Ahmad Nami, Prince of the Ottoman Empire, 5th Prime Minister of Syria and