Angus Cowan (1869 - 1943)

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1869 - In the year that Angus Cowan was born, on March 4th, Ulysses S. Grant became the 18th President of the United States. Previously a Union General, Grant beat the Democrat candidate, Horatio Seymour, 52.7% to 47.3% in the general vote.

1897 - She was 28 years old when in the January 22nd issue of "Engineering", the word "computer" was first used to refer to a mechanical calculation device. Previously - since the 17th century - the term computer meant "one who computes" and referred to human beings who worked with numbers.

1900 - Agnes was 31 years old when the German physicist Max Planck formulated an energy theory, postulating the existence of "quanta," which lays the groundwork for the quantum theory of modern physics. In December, he introduced a paper on the Planck postulate which stated that E=hv - the energy of a photon is proportional to its frequency times a constant. Planck won a Nobel Prize in 1918 for his work in theoretical Physics.

1917 - By the time she was 48 years old, Dutch exotic dancer Mata Hari was convicted and executed as a German spy. Since Mata Hari, born Margaretha Geertruida "Margreet" MacLeod, was a citizen of the Netherlands (which remained neutral in World War 1), she could travel freely in Europe. Her travels (and her romantic entanglements) raised suspicion and she was arrested by the French and found guilty. There is still controversy about her guilt although her name has become synonymous with a seductive female spy.

1943 - In the year of Angus Cowan's passing, on June 20th through June 22nd, the Detroit Race Riot erupted at Belle Isle Park. The rioting spread throughout the city (made worse by false rumors of attacks on blacks and whites) and resulted in the deployment of 6,000 Federal troops. 34 people were killed, (25 of them black) - mostly by white police or National Guardsmen, 433 were wounded (75 percent of them black) and an estimated $2 million of property was destroyed. The same summer, there were riots in Beaumont, Texas and Harlem, New York.

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