Justus von Liebig Quotes - Page 2

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• Only about seventy years ago was chemistry, like a grain of seed from a ripe fruit, separated from the other physical sciences. With Black, Cavendish and Priestley, its new era began. Medicine, pharmacy, and the useful arts, had prepared the soil upon which this seed was to germinate and to flourish.

  Justus von Liebig

  Art, Science, Years

  Justus von Liebig (1859). “Familiar Letters on Chemistry, in its relation to Physiology, Dietetics, Agriculture, Commerce and Political Economy: Edited by John Blyth”, p.5

  7 Copy quote

• What struck me most in England was the perception that only those works which have a practical tendency awake attention and command respect, while the purely scientific, which possess far greater merit are almost unknown. And yet the latter are the proper source from which the others flow. Practice alone can never lead to the discovery of a truth or a principle. In Germany it is quite the contrary. Here in the eyes of scientific men no value, or at least but a trifling one, is placed upon the practical results. The enrichment of science is alone considered worthy attention.

  Justus von Liebig

  Eye, Science, Men

  6 Copy quote

• There are various causes for the generation of force: a tensed spring, an air current, a falling mass of water, fire burning under a boiler, a metal that dissolves in an acid-one and the same effect can be produced by means of all these various causes. But in the animal body we recognise only one cause as the ultimate cause of all generation of force, and that is the reciprocal interaction exerted on one another by the constituents of the food and the oxygen of the air. The only known and ultimate cause of the vital activity in the animal as well as in the plant is a chemical process.

  Justus von Liebig

  Spring, Fall, Mean

  7 Copy quote

• In the progressive growth of astronomy, physics or mechanical science was developed, and when this had been, to a certain degree, successfully cultivated, it gave birth to the science of chemistry.

  Justus von Liebig

  Science, Growth, Degrees

  David M. Knight, Justus von Liebig (1998). “The Development of Chemistry, 1789-1914: Familiar letters on chemistry”, p.2, Taylor & Francis

  4 Copy quote

• The person who observes a clock, sees in it not only the pendulum swinging to and fro, and the dial-plate, and the hands moving, for a child can see all this; but he sees also the parts of the clock, and in what connexion the suspended weight stands to the wheel-work, and the pendulum to the moving hands.

  Justus von Liebig

  Children, Moving, Science

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• From one sublime genius-NEWTON-more light has proceeded than the labour of a thousand years preceding had been able to produce.

  Justus von Liebig

  Science, Light, Years

  5 Copy quote

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