Friedrich Wilhelm Ostwald (2 September 1853 – 4 April 1932) was a Baltic German chemist. He received the Nobel Prize in Chemistry in 1909 for his work on catalysis, chemical equilibria and reaction velocities. Ostwald, Jacobus Henricus van 't Hoff, and Svante Arrhenius are usually credited with being the modern founders of the field of physical chemistry.
1.) Jürgen Kocka (2010). Jürgen Kocka. ed. Work in a Modern Society: The German Historical Experience in Comparative Perspective. Berghahn Books. p. 45. ISBN 978-1-84545-575-0. "Even Wilhelm Ostwald, who was the most radical atheist among these scholars, uses the instrument of the 'Monistic Sunday Sermons' to spread his ideas on rationality."