The diversity of the climate of the land, however, is compensated for, in Greece, by a uniformity in the climate of the maritime districts. As in a mountain valley, the winds of the Ægean Sea blow alternately in contrary directions. During nearly the whole of summer the atmospheric currents of Eastern Europe are attracted towards the African deserts. The winds from the north of the Archipelago and Macedonia then speed the navigator on his voyage to the south, and on many occasions the conquering tribes of the northern shores of that sea have availed themselves of them in their improvised attacks upon the inhabitants of the more southern districts of Asia Minor and of Greece. These regular northerly currents, known as etesian or annual winds, cease on the termination of the hot season, when the sun stands above the southern tropic. They are, moreover, interrupted every night, when the cool sea air is attracted by the heated surface of the land. When the sun has set the wind gradually subsides; there is a calm, lasting a few moments; and then the air begins to move in an inverse direction—“the land begins to blow,” as the sailors say. Nor is this regular wind without its counter-current, known as the _embates_, or propitious south-easterly breeze of which the poets sing. General winds and breezes, moreover, are deflected from their original directions in consequence of the configuration of the coast and the direction of mountain chains. The Gulf of Corinth, for instance, is shut in by high mountains on the north and the south, and the winds alternately enter it from the east or west—a phenomenon likened by Strabo to the breathing of an animal. The rains, like the winds, deviate in many places from the average, and whilst the water pours down into some mountain valleys as into a funnel, elsewhere the clouds drift past without parting with a drop of their humid burden. Contrasts in the amount of precipitation are thus added to those resulting from differences of configuration and variety of climate. As a rule, rain is more abundant on the western shores of Greece than on the eastern, and this fact accounts for the smiling aspect of the hills of Elis, as compared with the barren declivities of Argolis and Attica. Thunder-storms, driven before the winds of the Mediterranean, likewise recur with greater regularity in the western portion of the peninsula. In Elis and Acarnania the roll of thunder may be heard in spring daily, for whole weeks, in the afternoon. No sites more apposite could have been found for temples dedicated to Jupiter, the god of lightning. * * * * *