infall, just as green wood gives most smoke, and since this evaporation is wind, it is natural that the most and most important winds should come from these quarters. (The winds from the north are called Boreae, those from the south Noti.)
The course of winds is oblique: for though the evaporation rises straight up from the earth, they blow round it because all the surrounding air follows the motion of the heavens. Hence the question might be asked whether winds originate from above Converse Jack Purcell or from below. The motion comes from above: before we feel the wind blowing the air betrays its presence if there are clouds or a mist, for their motion shows that the wind has begun to blow before it North Face Fast Drying Takki has actually reached us; and this implies that the source of winds is above. But since wind is defined as ‘a quantity of dry evaporation from the earth moving round the earth’, it is clear that while the origin of the motion Atletico Madrid Dame Fodboldtrøjer is from above, the matter and the generation of wind come from below. Ireland Pelipaidat The oblique movement of the rising evaporation is caused from above: for the motion of the heavens determines the processes that Leicester City Fodboldtrøjer are at a distance from the earth, and the motion from below is vertical Morocco Fodboldtrøjer and every cause is more active where it is nearest to the effect; but in its generation and origin wind plainly derives from the New York City FC earth.
The facts bear out the view that winds are formed by the gradual union of many evaporations just as rivers derive their sources from the water that oozes from the earth. Every wind is weakest in the spot from which it blows; as they proceed and leave their source at a distance they gather strength. Thus the winter in the north is windless and calm: that is, in the north itself; but, the breeze that blows from there so gently as to escape observation becomes a great wind as it passes on.
We have explained the nature and origin of wind, the occurrence of drought and rains, the reason why rain stops wind and wind rises after rain, the Tjekkiet Fodboldtrøjer prevalence of north and south winds and also why wind moves in the way it does.
5
The sun both checks the formation of winds and stimulates it. When the Portugal Børn evaporation is small in amount and faint the sun wastes it and dissipates by its greater heat the lesser heat contained in the evaporation. It also dries up the earth, the source of the evaporation, before the latter has appeared in bulk: just as, when you throw a little fuel into a great fire, PJS Naiset Arches it is often burnt up before giving off any smoke. In these ways the sun checks winds and prevents them from rising at Dame 17/18 all: it checks them by wasting the evaporation, and prevents their rising by drying up the earth quickly. Hence calm is very apt to prevail about the rising of Orion and lasts until the coming of the Etesiae and their ‘forerunners’.
Calm is due to two causes. Either cold quenches the Aston Villa Fodboldtrøjer evaporation, for instance a sharp frost: or excessive heat wastes it. In the intermediate periods, too, the causes are generally either that the evaporation has not had time to develop or that it has passed away and there is none as yet to replinks:
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