In looking forward to the future of our great cities, the mind must revert occasionally to the propitious climate of the Southern States, and to them as the means of supply. Every information that we can obtain on the subject should be studied; we present the following extracts from a private letter as curious and instructive:

"My Dear Sir, - The climate is so genial, so suited to my constitution and habits, that I could no more be prevailed to live in the sour, bitter north. Balsamic air by day, balsamic and a little refreshing at night; but always bracing. A man can live here outdoors every hour of the day and night, as in sweet Italy: barring the fleas, and dust, and bald mountains of that paradise peopled by demons.

"How would you enjoy a ride at six miles an hour for three or four hours, from twelve to three P.M.? and that under a temperature (as usual) of between eighty and ninety, or ninety-four degrees! Well, I can frankly tell you that 1 do enjoy it, and that it is less hot and oppressive than seventy-five degrees in the North. Were it not so, the South would not be inhabited. Those who talk about the South know only such dens - unfit for men - as Savannah, Charleston, and New Orleans. Live in the open, broad, plateaux, and you will experience my sensations. The fact is, 1 have been out at least fourteen hours if not sixteen every day, and have not been incommoded by the son. The only thing I complain about is, too much fine weather, too many cloudless days, and too much of the most luscious fruit of the world; always melons, peaches, apples, plums, nectarines, blackberries; you can scarcely refrain from eating too much; but still it never hurts me. Six or eight melons a day, and a basket of choice fruit, is just what I want, .and am used to. We have here plenty of nice berries, wild plums, (chickasaw,) wild cherries, (over sweet,) blackberries of the finest quality, etc., in the woods, besides, a perfect multitude of the finest flowers in succession.

What a wonder of creation is that Lagerstroemia, blossoming nearly six weeks, and the most graceful tree (bearing when a little shrub), that can be seen I and the Mimosa, and the Pride of China, and the wild blue Glycina 1 Trumpet vines are a drug; they are everywhere. It would take me a sheet to enumerate the garden flowers scattered all over the fields and edges of woods, and in the woods. 1 know that Canada is highly civilized, (horticulturally speaking,) but - what pains to be taken I No, it would not pay! Here we take all from the lavish hand of nature. People don't know the South 1" We hope to hear more from our enthusiastic correspondent.