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February 9 - Chemistry Knowledge History

1950 - Californium (Cf, element 98) discovered by Kenneth Street, Jr., Stanley G. Thompson, Glenn T. Seaborg, and Albert Ghiorso using ion-exchange chromatography at University of California, Berkeley,

Birthdays

Edward Charles Baly 1871: showed that organic compounds, including sugars, can be formed photochemically from water, carbon dioxide, and ammonia

Lloyd Ferguson 1918: chemical educator

Norman Bruce Hannay 1921: materials for solid state electronics

(

http://iit-jee-chemistry.blogspot.com/2012/07/chemistry-knowledge-history-february.html)

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February 9 - Mathematics Knowledge History

1883 The very ﬁrst issue of Science is published. The ﬁrst item in the “Weekly summary of the progess of science” contains a report by Thomas Craig that “Lindemann gave a proof of the fact that π cannot be a root of an equation of any degree with rational co-eﬁcients.

1986 Halley’s comet last reached perihelion. The next return to perihelion will be on 28 July 2061. (Mathematics helps to predict such long terms events with such precision.)

Birthdays

1489 Georg Hartmann ( February 9, 1489) was a German engineer, instrument maker, author, printer, humanist, churchman, and astronomer.

1775 Farkas Bolyai (9 Feb 1775) Hungarian mathematician, poet, and dramatist who spent a lifetime trying to prove Euclid's (fifth) postulate that parallel lines do not meet.

1880 Lipót Fejér (9 Feb 1880 Fejér's main work was in harmonic analysis working on Fourier series and their singularities.

1907 Harold Scott MacDonald Coxeter (9 Feb 1907 ) graduated from Cambridge and worked most of his life in Canada. His work was mainly in geometry. In particular he made contributions of major importance in the theory of polytopes, non-euclidean geometry, group theory and combinatorics.

1908 Alexander Dinghas (February 9, 1908) was a Turkish mathematician. He is known for his work in different areas of mathematics including differential equations, functions of a complex variable, functions of several complex variables, measure theory and differential geometry

1927 David John Wheeler FRS (9 February 1927) the Inventor of the Wheeler Jump, In 1951, he introduced the concept of the subroutine to computer programming,

http://pballew.blogspot.in/2015/02/on-this-day-in-math-february-9.html
A website for mathematics history is

http://www-history.mcs.st-and.ac.uk/Day_files/Now.html hosted by the University of St. Andrews in Scotland. The MAA also has a nice page

http://mathdl.maa.org.

For reading a theorem for the day, check out

http://www.theoremoftheday.org/display/ by Robin Whitty.

http://blogs.ams.org/mathgradblog/2012/09/07/day-mathematics-history/
Physics

Interesting Site

Oral Histories - Interviews

https://www.aip.org/history-programs/niels-bohr-library/oral-histories/4724
Thomas Kuhn with H.G. Kuhn

Engineering

1969 – First test flight of the Boeing 747.

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