I am convinced, therefore, that the sun is the cause of this phenomenon. The dryness of the air in these parts is also caused by the sun, in my opinion, because it burns its way through it; hence, it is always summer in the inland part of Libya . But were the stations of the seasons changed, so that the south wind and the summer had their station where the north wind and winter are now set, and the north wind was where the south wind is now—if this were so, the sun, when driven from mid-heaven by the winter and the north wind, would pass over the inland parts of Europe as it now passes over Libya , and I think that in its passage over all Europe it would have the same effect on the Ister as it now does on the Nile .