the communication of the principles of these respective sciences to the youthful and inquiring mind. The report from the Postmaster-General exhibits the condition of that Department as highly satisfactory for the present and still more promising for the future. Its receipts for the year ending the 1st of July last amounted to $1,473,551, and exceeded its expenditures by upward of $100,000. It can not be an oversanguine estimate to predict that in less than ten years, of which one-half have elapsed, the receipts will have been more than doubled. In the meantime a reduced expenditure upon established routes has kept pace with increased facilities of public accommodation and additional services have been obtained at reduced rates of compensation. Within the last year the transportation of the mail in stages has been greatly augmented. The number of post-offices has been increased to 7,000, and it may be anticipated that while the facilities of intercourse between fellow-citizens in person or by correspondence will soon be carried to the door of every villager in the Union, a yearly surplus of revenue will accrue which may be applied as the wisdom of Congress under the exercise of their constitutional powers may devise for the further establishment and improvement of the public roads, or by adding still further to the facilities in the transportation of the mails. Of the indications of the prosperous condition of our country, none can be more pleasing than those presented by the multiplying relations of personal and intimate intercourse between the citizens of the Union dwelling at the remotest distances from each other. Among the subjects which have heretofore occupied the earnest solicitude and attention of Congress is the management and disposal of that portion of the property of the nation which consists of the public lands. The acquisition of them, made at the expense of the whole Union, not only in treasure but in blood, marks a right of property in them equally extensive. By the report and statements from the General Land Office now communicated it appears that under the present Government of the United States a sum little short of $33,000,000 has been paid from the common Treasury for that portion of this property which has been purchased from France and Spain, and for the extinction of the aboriginal titles. The amount of lands acquired is near 260,000,000 acres, of which on the 1st of January, 1826, about 139,000,000 acres had been surveyed, and little more than 19,000,000 acres had been sold. The amount paid into the Treasury by the purchasers of the public lands sold is not yet equal to the sums paid for the whole, but leaves a small balance to be refunded. The proceeds of the sales of the lands have long been pledged to the creditors of the nation, a pledge from which we have reason to hope that they will in a very few years be redeemed.