dense and watery though not yet quite water, causes the sun’s true colour to appear just as it does when the reflection is from the dense, smooth surface of copper. So the sun’s colour being white, the mock sun is white too. This, too, is the reason why the mock sun is a surer sign of rain than the rods; it indicates, more than they do, that the air is ripe for the production of water. Further a mock sun to the south is a surer sign of rain than one to the north, for the air in the south is readier to turn into water than that in the north.
Mock suns and rods are found, as we stated, about sunset and sunrise, not above the sun nor below it, but beside it. They are not found very close to the sun, nor very far from it, for the sun dissolves the cloud if it is near, but if it is far off the reflection cannot take place, since sight weakens when it is reflected from a small mirror to a very distant object. (This is why a halo is never found opposite to the sun.) If the cloud is above the sun and close to it the sun will dissolve it; if it is above the sun but at a distance the sight is too weak for the reflection to take place,Belgium Damen, and so it will not reach the sun. But at the side of the sun,Austria Drakt, it is possible for the mirror to be at such an interval that the sun does not dissolve the cloud, and yet sight reaches it undiminished because it moves close to the earth and is not dissipated in the immensity of space. It cannot subsist below the sun because close to the earth the sun’s rays would dissolve it, but if it were high up and the sun in the middle of the heavens, sight would be dissipated. Indeed,Eindhoven Drakter, even by the side of the sun, it is not found when the sun is in the middle of the sky,Nicolas Otamendi Jersey, for then the line of vision is not close to the earth, and so but little sight reaches the mirror and the reflection from it is altogether feeble.
Some account has now been given of the effects of the secretion above the surface of the earth; we must go on to describe its operations below,Danny Welbeck Jersey, when it is shut up in the parts of the earth.
Just as its twofold nature gives rise to various effects in the upper region, so here it causes two varieties of bodies. We maintain that there are two exhalations, one vaporous the other smoky, and there correspond two kinds of bodies that originate in the earth, ‘fossiles’ and metals. The heat of the dry exhalation is the cause of all ‘fossiles’. Such are the kinds of stones that cannot be melted,Bayern Drakter, and realgar, and ochre,Thomas Meunier Jersey, and ruddle,Koszulki Thiago Silva, and sulphur,Cesar Azpilicueta Jersey, and the other things of that kind, most ‘fossiles’ being either coloured lye or, like cinnabar,Real Madrid Damen, a stone compounded of it. The vaporous exhalation is the cause of all metals, those bodies which are either fusible or malleable such as iron,Stephan El Shaarawy Jersey, copper,Yaya Sanogo Jersey, gold. All these originate from the imprisonment of the vaporous exhalation in the earth, and especially in stones. Their dryness compresses it, and it congeals just as dew or hoar-frost does when it has been separated off, though in the present case the metals are generated before that segregation occurs. H
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