different bodies, produced by single quantitative additions of the elements and always in the same proportions. This occurs absolutely where all elements of the combinations change their quantity in the same proportions, so with normal paraffin, CnH2 n + 2: the lowest is CH4 a gas, the highest known is C<sub<16</sub< H34, a body forming a hard colorless crystal which melts at 21° and boils at 278°. In both the series each new step is reached through the introduction of CH2, an atom of carbon and two atoms of hydrogen, to the molecular form of the preceding step, and this quantitative change in the molecular form brings about a qualitatively different body.
These series are merely obvious examples. Almost universally in chemistry, particularly in the different oxides of nitrogen, in the oxi-acids of phosphorus or sulphur, one can see how "quantity suddenly changes into quality" and how this so called "confused Hegelianism" is, so to speak, inherent in things and events, and no one is ever confused or beclouded by it, except Herr Duehring. If Marx is the first to observe this, and if Herr Duehring points this out, without understanding it (since he could not let so unheard of a crime pass), he should explain which of the two, Marx or Duehring, is without elementary conceptions of natural science and the established principles of chemistry, and do it without boasting about his own ideas on natural philosophy.
In conclusion, let us call attention to a witness on the change of quantity into quality, namely Napoleon. He describes the conflicts between the French cavalry, bad riders but disciplined, with the Mamelukes who, as regards single combat were better horsemen but undisciplined, as follows—Two Mamelukes were a match for three Frenchmen, one hundred Mamelukes were equal to one hundred Frenchmen, three hundred Frenchmen
