We begin with the warmth-ether as the only modification of ether which combines certain etheric with certain physical properties. Constituting as it does a border-condition between the two worlds, the warmth-ether has, on the one hand, the function of receiving the picture-weaving transmitted to it by the higher ethers, and, on the other, of bringing physical matter into the state where it becomes receptive to the working of the etheric forces. The warmth-ether achieves this by freeing matter from being controlled one-sidedly by the centre-bound forces of the earth. It thus calls forth, when acting physically, the processes of melting of solids and of evaporation of liquids: phenomena which yielded the initial observations for our introduction of the concept of levity. In processes of this kind we now recognize the physical manifestation of a universal function of the warmth-ether, namely, to divest matter of all form and to lead it over from the realm dominated by gravity into that of levity. Provided we attach the right meaning to the word, we may say that the function of the warmth-ether is to bring about chaos at the upper border of physical nature. It is thus that we have already found it working in the plant, when through the union of the pollen with the seed a state of chaos is produced within the seed, which enables the type to impress anew its form-principle into it. Another instance of the warmth-ether's anti-gravitational effect, also discussed earlier, is the earth's seismic activity. True, it appears at first sight as if little were gained by speaking of warmth-ether, instead, as we did previously, of levity in general. But it must not be forgotten that in the ether-realm as a whole, warmth - that is, the overcoming of earthly gravity - is only one of the four modes of etheric action, albeit the one which enables the other three to work into the physical world. We shall see, later on, that only by taking into account the action of the higher modifications of the ether is it possible to gain insight into the true causes of the apparently so arbitrary occurrences of volcanic and kindred phenomena. Here, too, it is the function of the warmth-ether to produce in the physical sphere the chaos which is necessary to make the physical sphere receptive to the activities going on in higher spheres. In view of this universal function of the warmth-ether, which distinguishes it from the other modifications of ether, we may give it as a second name that of 'chaoticizing ether'. * * * (c) LIGHT