A larger and more important series of condensations may be grouped together as resulting from the elimination of the elements of water between carbonyl (CO) and methylene (CH 2) groups.
Similar condensations produced the sun and stars; and the flaming state of these bodies is due to the velocity of their motions.
The philosophical works, occupying the first six and the last of the twenty-one volumes, are generally divided according to the Aristotelian scheme of the sciences, and consist of interpretations and condensations of Aristotle's relative works, with supplementary discussions depending on the questions then agitated, and occasionally divergences from the opinions of the master.
The cycle of its transformations and successive condensations constitutes the life of the universe, the mode of existence proper to finite and particular being.
In the course of the 19th century the idea that the different elements are constituted by different groupings or condensations of one primal matter - a speculation which, if proved to be well grounded, would imply the possibility of changing one element into another - found favour with more than one responsible chemist; but experimental research failed to yield any evidence that was generally regarded as offering any support to this hypothesis.