Johann Jakob Balmer
Mathematician known for Balmer series
Born
Died
1898
128 years ago — 73 years old
Category
Scientists & Innovators
Country
Switzerland
Links & References
Contributed to the field of mathematics and physics. Formulated the Balmer series, which describes the spectral lines of hydrogen, establishing significant groundwork for quantum mechanics. This series provided insights into atomic structure, further impacting the study of atomic spectra and later developments in quantum theory.
Formulated the Balmer series for hydrogen spectral lines
Published the book 'Vorlesungen über die Theorie der Elektrodynamik'
Other People Born on May 1st
Rinchinbal Khan
Mongolian emperor during the Yuan dynasty
Born
May 1st, 1326 699 years ago
Died
December 14th, 1332 693 years ago — 6 years old
Rinchinbal Khan served as an emperor of the Yuan dynasty in Mongolia during the 14th century. Rinchinbal reigned during a time of political challenges and changes within the empire. The rule was marked by various military campaigns aimed at consolidating power and responding to internal strife. Rinchinbal's leadership faced difficulties from rival factions and tribes within the Mongolian territories. Despite these challenges, his reign contributed to the continuity of the Yuan dynasty at a time when it was vulnerable to both internal and external pressures.
Continue ReadingAlbert Zafy
Politician, 3rd President of Madagascar
Born
May 1st, 1927 98 years ago
Died
October 13th, 2017 8 years ago — 90 years old
Served as the 3rd President of Madagascar from 1993 to 1996 after winning the presidency in democratic elections. Prior to the presidency, held various roles in the Malagasy government, including Minister of Industry and Trade. Advocated for political reform and a new constitution during leadership. Involved in Madagascar's politics throughout his career, emphasizing democracy and development.
Continue ReadingSidónio Pais
Portuguese politician and 4th President
Born
May 1st, 1872 153 years ago
Died
1918 108 years ago — 46 years old
An influential soldier and politician in early 20th century Portugal, served as the 4th President from 1918 until assassination in 1919. After a military coup in 1917, assumed leadership of the country and implemented significant political reforms. Advocated for national stability and economic recovery during a tumultuous period marked by social unrest and World War I. His presidency ended following a violent coup.
Continue ReadingJoseph Addison
English essayist and playwright
Born
May 1st, 1672 353 years ago
Died
June 17th, 1719 306 years ago — 47 years old
An English essayist, poet, and playwright whose works shaped the landscape of early 18th-century literature. Played a pivotal role in establishing the periodical essay format, particularly through contributions to The Tatler and The Spectator. Addison's writings often explored themes of virtue, personal conduct, and social harmony. As a politician, he held the office of Secretary of State for Southern Affairs. His literary contributions are regarded as significant in the development of the English essay and political commentary.
Continue ReadingEndel Puusepp
Estonian-Soviet military pilot and politician
Born
May 1st, 1909 116 years ago
Died
June 18th, 1996 29 years ago — 87 years old
Born in 1909, served as a military pilot in the Soviet Air Force during World War II. Participated in several significant air operations and received multiple awards for bravery. Transitioned into a political career post-war, holding various positions in government. Contributed to aviation and military policy development within the Estonian SSR.
Continue ReadingClelia Lollini
Italian physician, women's health advocate
Born
May 1st, 1890 135 years ago
Graduated in Medicine and Surgery, completed medical studies at the University of Bologna. Specialized in obstetrics and gynecology, focusing on women's health issues. Contributed to advancements in the understanding of gynecological conditions and reproductive health. Worked in various medical institutions, promoting initiatives for women's healthcare and education. Participated in professional associations and fostered collaboration among peers to improve health services for women. Died in the early 1960s.
Continue Reading