We believe that a structure of white, with green blinds, is almost peculiar to this country. In the most propitious situations, and under the happiest circumstances, the colors are unquestionably unsuited to architecture, which, like statuary, should have but one tint. If, however, it be deemed essential to the flaunting tastes of the mistress of some mansion, to cause the hues of the edifice in which she resides to be as gay as her _toilette_, we earnestly protest against the bright green that is occasionally introduced for such purposes. There is a graver tint, of the same color, that entirely changes the expression of a dwelling. Place two of these houses in close proximity, and scarcely an intellectual being would pass them, without saying that the owner of the one was much superior to the owner of the other in all that marks the civilized man. Put a third structure in the immediate vicinity of these two, that should have but one color on its surface, including its blinds, and we think that nine persons in ten, except the very vulgar and uninstructed, would at once jump to the conclusion that the owner of this habitation was in tastes and refinement superior to both his neighbors. A great improvement, however, in rural as well as in town architecture, is now in the course of introduction throughout all the northern states. More attention is paid to the picturesque than was formerly the case, and the effects are becoming as numerous as they are pleasing. We should particularize New Haven, as one of those towns that has been thus embellished of late years, and there are other places of nearly equal size that might be mentioned as having the same claims to an improved taste. But to return to the great distinctive features between an ordinary American landscape and a similar scene in Europe. Of the artificial accessories it is scarcely necessary to say any more. One does not expect to meet with a ruined castle or abbey, or even fortress, in America; nor, on the other hand, does the traveller look for the forests of America, or that abundance of wood which gives to nearly every farm a sufficiency for all the common wants of life, on the plains and heights of the old world. Wood there certainly is, and possibly enough to meet the ordinary wants of the different countries, but it is generally in the hands of the governments or the great proprietors, and takes the aspect of forests of greater or less size that are well cared for, cleared and trimmed like the grounds of a park.