“"Normal science" means research firmly based upon one or more past scientific achievements, achievements that some particular scientific community acknowledges for a time as supplying the foundation for its further practice”
Source: The Structure of Scientific Revolutions (1962), II. The Route to Normal Science, p. 10
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Thomas Kuhn 27
American historian, physicist and philosopher 1922–1996Related quotes

Kobos, Andrzej (2012). Po drogach uczonych. 5. Polska Akademia Umiejętności. pp. 317–335. ISBN 978-83-7676-127-5.

Paragraph 20
2006, Letter to George W. Bush, 2006

Source: Applied Motion Study (1917), p. 3.

Preface.
A History of Science Vol.1 Ancient Science Through the Golden Age of Greece (1952)
Source: Information Science in Theory and Practice (1987), p. v; As cited in: Lyn Robinson and David Bawden (2011).

Pg 159.
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p, 125
"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)