The great free trade leader of France, Michael Chevalier, writes a long and interesting eommunication to the New York WoiU, reviewing the struggle againat a restricted trade iu Prance. After dwelling upon the desperate effort of M. Thiers to restore the polioy of protection and his aignal failure to realize i his deaire, M. Chevalier notes with I nent satisfaction the fact that the population of the country have becoine enthusiastic supporters of the doctrine of free trade. The farmer has perceived, at ■ Last, that protection ouly existed on paper. There is no expedient of customs which ean raise the price of wine in France, because of the immense quantity of winewhich she produces. As to the cereals, the sliding scale could not prevent their low price when the harvests were very good, and if by uiischance they were inefficiënt it was a rule that the sliding scale should be suspended to prevent the enhancement of prices. Beef and the accüssory product of cattle being already too dear for the consutner, supposing that the customs tariff had had the power to raise their price, it would have been a most hannful result. For these reasons the agriculturists, indifferent up to 1800, have for some years been rallied to the flag of oommercial freedom. It is with reBpect to their products that the ohanges in their tariff have been most profound. The greater part of these products - wine, cereals, meats - such, that is to say, as are imported froin abroad, bear only the most insigniflcant duties ; and, notwithatanding, nnver has French agriculture been more prosperous. This is an argumenof fact which has completed the convert sion of the agriculturists to free trade.