[Footnote 156: Acosta is the first philosopher who endeavored to account for the different degrees of heat in the Old and New Continents by the agency of the winds which blow in each, (_Hist. Moral._, lib. ii. and iii.) M. de Buffon adopted the same theory, and illustrated it with many new observations. "The prevailing winds, both in Upper and Lower Canada, are the northeast, northwest, and southwest, which all have a considerable influence on the temperature of the atmosphere and the state of the weather. The southwest wind is the most prevalent, but it is generally moderate, and accompanied by clear skies; and the northeast and easterly winds usually bring with them continued rain in summer, and snow in winter; the northwest is remarkable for its dryness and elasticity, and, from its gathering an intense degree of frigor as it sweeps over the frozen plains and ice-bound hills in that quarter of the continent, invariably brings with it a perceptible degree of cold. Winds from due north, south, or west are not frequent. At Quebec, the direction of the wind often changes with the tide, which is felt for nearly sixty miles higher up the stream of the St. Lawrence."--Bonchette, vol. i., p. 343. "The northwest wind is uncommonly dry, and brings with it fresh animation and vigor to every living thing. Although this wind is so very piercing in winter, yet the people never complain so much of cold as when the northeast wind blows. The northeast wind is also cold, but it renders the air raw and damp. That from the southeast is damp, but warm. Rain or snow usually falls when the wind comes from any point toward the east. The northwest wind, from coming over such an immense tract of land, must necessarily be dry; and, coming from regions eternally covered with mounds of snow and ice, it must also be cold. The northeast wind, from traversing the frozen seas, must be cold likewise; but, from passing over such a large portion of the watery main afterward, it brings damp and moisture with it. All those from the northeast are damp, and loaded with vapors from the same cause. Southerly winds, from crossing the warm regions between the tropics, are attended with heats; and the southwest wind, from passing, like the northwest, over a great extent of land, is dry at the same time."--Weld's _Travels in America_, 4th ed., p. 184. Kalm says, p. 748, that he was assured that "the northeast wind, when it is very violent in winter, pierces through walls of a moderate thickness, so that the whole wall on the inside of the house is covered with snow, or a thick hoar frost. The wind damages severely the houses that are built of stone, so that the owners are frequently obliged to repair them on the northeast side. In summer the north wind is generally attended with rain."--Kalm in Pinkerton, vol. xiii., p. 651.]