Translations:Benutzer:Arian/Klett-Mini-Test/1419/en

1 When an organic substance — coal or wood, for instance — is burned, one observes how its substance-composition disappears and a series of other substance compositions emerges as transformation products: gases and ash, for example. Conversely, a series of substances reacting with one another transforms into a new composition (compound) — carbon, oxygen, nitrogen, hydrogen, and sulphur into protein, for example. The whole course of nature reveals, in all its appearances, a continuous transformation of substance.