The MANURES used in this country for the culture of the above named plants are mostly such as are made on the farm, consisting chiefly of barnyard composts of various kinds, with often a large admixture of peat-mud. There are few farms that do not contain substances, which, if properly husbanded, would add very greatly to the amount of manure ordinarily made. The best of the concentrated manures, which it is sometimes necessary to use, for want of time and labor to prepare enough upon the farm, is, unquestionably, Peruvian guano. The results of this, when properly applied, are well known and reliable, which can hardly be said of any other artificial manure offered for the farmer's notice. The chief objection to depending upon manures made off the farm is, in the first place, their great expense; and in the second--which is equally important--the fact, that, though they may be made valuable, and produce at one time the best results, a want of care in the manufacture, or designed fraud, may make them almost worthless, with the impossibility of detecting the imposition, without a chemical analysis, till it becomes too late, and the crop is lost. It is, therefore, safest to rely mainly upon the home manufacture of manure. The extra expense of soiling cattle, saving and applying the liquid manure, and thus bringing the land to a higher state of cultivation, when it will be capable of keeping more stock and furnishing more manure, would offer a surer road to success than a constant outlay for concentrated fertilizers. THE BARN. The farm barn, next to the farm house, is the most important structure of the farm itself, in the Northern and Middle States; and even at the South and Southwest, where barns are less used, they are of more importance in the economy of farm management than is generally understood. Indeed, to the eyes of a person of taste, a farm or plantation appears incomplete, without good barn accommodations, as much as without good household appointments--and without them, no agricultural establishment can be complete in all its proper economy. The most _thorough_ barn structures, perhaps, to be seen in the United States, are those of the State of Pennsylvania, built by the German farmers of the lower and central counties. They are large, and expensive in their construction; and, in a strictly economical point of view, are, perhaps, more costly than is required. Yet, there is a substantial durability about them, that is exceedingly satisfactory, and, where the pecuniary ability of the farmer will admit, they may well furnish models for imitation.