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 LiebigObservation is like a piece of glass, which, as a mirror, must be very smooth, and must be very carefully polished, in order that it may reflect the image pure and undistorted.
Justus von LiebigThe secret of all those who make discoveries is that they regard nothing as impossible.
Justus von LiebigWe may fairly judge of the commercial prosperity of a country from the amount of sulphuric acid it consumes.
Justus von Liebig