In a picture of the seismic activities of the earth which is to comprise phenomena of this kind, the volcanic or tectonic effects cannot be attributed to purely local causes. For why, then, should the whole meteorological sphere be involved, and why should living beings react in the way described? Clearly, we must look for the origin of the total disturbance not in the interior of the earth but in the expanse of surrounding space. Indeed, the very phenomenon of the Solfatara, if seen in this light, can reveal to us that at least the volcanic movements of the earth's crust are not caused by pressure from within, but by suction from without - that is, by an exceptional action of levity.