Template:Today in Math History for June 19

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June 19, 1623 Blaise Pascal is born in Clermont (now Clermont-Ferrand).
June 19, 1741 Leonhard Euler leaves St. Petersburg.
June 19, 1799 Thomas Jefferson writes a letter declaring that trigonometry, the computation of square and cubic roots, logarithms, and "algebra as far as the quadratic equation" are "most valuable to every man," but topics beyond those are "but a luxury" to a man who has to make a living.

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