e. Then the sun began to dry it up,Menn Moncler Bulgarie Norge Salg, part of it evaporated and is the cause of winds and the turnings back of the sun and the moon,CG Dame Whistler Parka, while the remainder forms the sea. So the sea is being dried up and is growing less, and will end by being some day entirely dried up. Others say that the sea is a kind of sweat exuded by the earth when the sun heats it, and that this explains its saltness: for all sweat is salt. Others say that the saltness is due to the earth. Just as water strained through ashes becomes salt,FC Metz Pas Cher, so the sea owes its saltness to the admixture of earth with similar properties.
We must now consider the facts which prove that the sea cannot possibly have springs. The waters we find on the earth either flow or are stationary. All flowing water has springs. (By a spring, as we have explained above, we must not understand a source from which waters are ladled as it were from a vessel,Parajumpers Kobiety Simona, but a first point at which the water which is continually forming and percolating gathers.) Stationary water is either that which has collected and has been left standing, marshy pools, for instance,Dame Moncler Gene, and lakes,Sporting Gijon Pas Cher, which differ merely in size, or else it comes from springs. In this case it is always artificial, I mean as in the case of wells, otherwise the spring would have to be above the outlet. Hence the water from fountains and rivers flows of itself,Chaussures Nike Femme, whereas wells need to be worked artificially. All the waters that exist belong to one or other of these classes.
On the basis of this division we can sec that the sea cannot have springs. For it falls under neither of the two classes,Dame Moncler Suyen; it does not flow and it is not artificial,CG Dame Lodge Down Hoody Jakke Norge Salg; whereas all water from springs must belong to one or other of them. Natural standing water from springs is never found on such a large scale,Ukraine Pas Cher.
Again, there are several seas that have no communication with one another at all. The Red Sea,Canada Goose Freestyle Väst, for instance, communicates but slightly with the ocean outside the straits, and the Hyrcanian and Caspian seas are distinct from this ocean and people dwell all round them. Hence, if these seas had had any springs anywhere they must have been discovered.
It is true that in straits, where the land on either side contracts an open sea into a small space, the sea appears to flow. But this is because it is swinging to and fro. In the open sea this motion is not observed,Chaussures Nike Air Max 97, but where the land narrows and contracts the sea the motion that was imperceptible in the open necessarily strikes the attention.
The whole of the Mediterranean does actually flow. The direction of this flow is determined by the depth of the basins and by the number of rivers. Maeotis flows into Pontus and Pontus into the Aegean. After that the flow of the remaining seas is not so easy to observe. The current of Maeotis and Pontus is due to the number of rivers (more rivers flow into the Euxine and Maeotis than into the whole Mediterranean with its much larger basin), and to their own shallowness. For we find the sea getting deeper and deeper. Pontus is deeper than Maeotis, the Aegean than Pontus, the Sicilian se
相关的主题文章：
http://cgi.tako.ne.jp/~friends/bbs3/light.cgi?res=7180
http://inuu.k2.xrea.com/aska/aska.cgi
http://www13.plala.or.jp/white_roots/gwbbs/gwbbs.cgi |
