Ernst Mach (1838–1916) Austrian physicist and university educator
Source: 19th century, Popular Scientific Lectures [McCormack] (Chicago, 1898), p. 197; On mathematics and counting.
Source: "Presidential Address British Association for the Advancement of Science," 1890, p. 467 : On the theory of numbers
Ernst Mach (1838–1916) Austrian physicist and university educator
Source: 19th century, Popular Scientific Lectures [McCormack] (Chicago, 1898), p. 197; On mathematics and counting.
Justus von Liebig (1803–1873) German chemist
Familiar Letters on Chemistry, Tr. Blythe, 4th ed., London, 1859, p. 60 as quoted by John Theodore Merz, A History of European Thought in the Nineteenth Century Vol.1 http://books.google.com/books?id=xqwQAAAAYAAJ (1903).
Nicholas Murray Butler (1862–1947) American philosopher, diplomat, and educator
Editor's Introduction, The Teaching of Elementary Mathematics https://books.google.com/books?id=NKoAAAAAMAAJ (1906) by David Eugene Smith
David Eugene Smith (1860–1944) American mathematician
David Eugene Smith, "Editor's Introduction," in: The Teaching of Elementary Mathematics https://books.google.com/books?id=NKoAAAAAMAAJ (1906)
Henry John Stephen Smith (1826–1883) mathematician
Report on the Theory of Numbers (1859) Part I, p. 49.
The Collected Mathematical Papers of Henry John Stephen Smith (1894) Vol. 1
Wilhelm Von Humboldt (1767–1835) German (Prussian) philosopher, government functionary, diplomat, and founder of the University of Berlin
Source: The Limits of State Action (1792), Ch. 16
Morris Kline (1908–1992) American mathematician
Source: Mathematical Thought from Ancient to Modern Times (1972), p. 495
Marcus du Sautoy (1965) British professor of mathematics
In "Life lessons" http://www.theguardian.com/science/2005/apr/07/science.highereducation?fb_ref=desktop The Guardian (7 April 2005)
Carl Gustav Jacob Jacobi (1804–1851) German mathematician
Letter to Legendre (July 2, 1830) in response to Fourier's report to the Paris Academy Science that mathematics should be applied to the natural sciences, as quoted in Science (March 10, 1911) Vol. 33 https://books.google.com/books?id=4LU7AQAAMAAJ&pg=PA359, p.359, with additional citations and dates from H. Pieper, "Carl Gustav Jacob Jacobi," Mathematics in Berlin (2012) p.46