which the value in controversy exceeds twenty-five thousand dollars, or in which the title or possession of real estate exceeding in value the sum of twenty-five thousand dollars, to be ascertained by the oath of either party or of other competent witnesses, is involved or brought in question, and such final judgments or decrees may and can be reviewed, revised, reversed, modified or affirmed by said Supreme Court of the United States on appeal or writ of error by the party aggrieved, in the same manner, under the same regulations, and by the same procedure, as far as applicable, as the final judgments and decrees of the Circuit Courts of the United States."