We have been honored by an invitation from Senator Guizot, Lavaline, to have the editor present at a Congress of French Vineyardists, to be held at Clermont Fer-rand, in France, on August 31st and September 1st. The object of the convention is to consider the many propositions that have been made in regard to the great " author of their ruin," the phylloxera. Clermont-Ferrand is said to be a chief wine center of France, and the re-union, it is thought, will be as interesting to those who come, as their knowledge will be valuable to vineyard culture. The invitation did not reach us till the 13th of August. We are sorry it did not come earlier, for though the editor would not have been able to be present, personally, he would have been glad to have had some of his horticultural friends visiting France, represent him on the occasion.