Flaming of the Earth's core

Moon and to a lesser extent the sun produces attractive effects on the equatorial part of the Earth and change the direction of Earth's axis. This is an extremely slow movement and is known in astronomy under the name of the process, or the equinoxes. Phenomenon should occur differently depending on whether the Earth is a solid ball surrounded by a thin crust is she, or consists of a thick shell and a relatively small nucleus. Hopkins failed to prove that observed in the process actually corresponds to the solid crust of approximately 170 - 215 Geography. miles. From this he concluded that the entire globe can be considered as a rigid body, which only exist in places cavities filled with flaming mass. Rightly pointed out that the calculation of Hopkins' stand on false grounds, the molten mass of the earth's innards can not be a real fluid, as this allows a scientist, she is so thick and sticky, the particles move with its large internal friction, in addition, there is friction on the boundary contact between the molten mass from the Earth's crust. Consequently, the conclusions of Hopkins's not true, even in the case of very rapid rotation, the more they do not apply to such a slow motion as a phenomenon of the procession. Poisson suggested that the solidification of the Earth began from the inside and that is why our entire planet is a solid mass. The process of cooling it provides as follows: on the surface of the Earth, situated in the fiery liquid, formed by cooling of solid blocks, exceeding his weight surrounding liquid, they fall down. All these arguments seem very simple, but many facts cast doubt on their validity. Lava often freezes in front of geologists, observing its flow, we see that the frozen lumps falling from the surface to depth, but rather, they cover all of the lava crust, beneath which, like a trumpet, moving fluid mass. During the eruption of Etna in 1865, Sylvester became even lumps of slag on the lava flow is moving, and they do not sink under his feet. Leaving aside the question of whether the lava ostyvshaya denser liquid, sufficient to indicate only the viscous state of the latter to make it clear why it can not sink frozen lumps. The same phenomenon occurs on Earth when it was a huge ball of molten, and its magma before freezing had become thick and viscous, and only then began to appear in places frozen solid areas; even if we assume that their density was more than the density of the surrounding fluid, then, in view of the foregoing, it is unlikely they could drown in this case. Thus, the hypothesis that Poisson is not proven, and most of the facts even spoke against it. Based on experiments Mallet, Siemens and others, glass, similar in its properties to the lava solidifies at a slightly expanded, new research has shown that iron, as well as granite, basalt and other rocks containing silicates, allocated from the same to them on the composition of the molten mass; Hue (Nies) showed that the frozen lava boulders floating, not only because of density and viscosity of magma, but mainly due to the smaller proportion of them. Thus, the first attempts to solve geophysical problems in Mechanics and astronomical point of view did not lead to any palpable findings. In an interesting new light presented these questions, through the efforts of eminent geophysicist W. Thomson (Lord Kelvin) and the mathematics of Darwin. Thomson decided geological problems by computing, and he, among other things, found that a ball having a diameter and velocity of the Earth and is composed of glass, steel or any other solid matter should be flattened at the poles under the influence of centrifugal force. Thus, the idea of ??Newton, claiming that his land is obliged to form an initial liquid state, is losing its credibility. That slight degree of plasticity, which have even solids, according to Thomson, is sufficient to ensure that there was compression of the ball at the poles. These data eliminate, apparently, the idea of ??a complete failure of solids alter its shape, attractive force of the moon and sun, reflected in the existence of a liquid shell of the Earth tides and otzhvov, should apply on the mainland: the latter can also detect some kind of hot flushes, but Of course, very slight, to prove them directly is extremely difficult. But in recent years and this issue is close to a decision. Comprehensive study of tides and are still in embryo observation Reber Pashvitsa and others over an extremely sensitive horizontal pendulum, which, using a recorder notes insignificant changes in the horizontal plane, seems to confirm the existence of prizhvov and low tides in the solid crust.