Portal:History of science/Selected anniversaries/October 29

October 29:

• 1675 – Leibniz makes the first use of the long s (∫) as a symbol of the integral in calculus

• 1783 – Death of Jean le Rond d'Alembert, French mathematician (b. 1717)

• 1827 – Birth of Marcellin Berthelot, French chemist (d. 1907)

• 1880 – Birth of Abram Ioffe, Soviet physicist (d. 1960)

• 1969 – The first-ever computer-to-computer link is established on ARPANET, the precursor to the Internet

• 1971 – Death of Arne Tiselius, Swedish chemist, Nobel laureate (b. 1902)

• 1991 – The American Galileo spacecraft makes its closest approach to 951 Gaspra, becoming the first probe to visit an asteroid

• 2004 – Death of Peter Twinn, English mathematician (b. 1916)