Template:Selected anniversaries/August 21: Difference between revisions

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||1888 – The first successful adding machine in the United States is patented by William Seward Burroughs.
||1888 – The first successful adding machine in the United States is patented by William Seward Burroughs.


||1909 – Nikolay Bogolyubov, Russian mathematician and physicist (d. 1992)
||1909 – Nikolay Bogolyubov, Russian mathematician and physicist (d. 1992). Pic. His method of teaching, based on creation of a warm atmosphere, politeness and kindness, is famous in Russia and is known as the "Bogoliubov approach".


||1911 – The Mona Lisa is stolen by a Louvre employee.
||1911 – The Mona Lisa is stolen by a Louvre employee.

Revision as of 11:12, 18 March 2018