All purchases of real estate made by emigrants resident within this commonwealth, previous to declaring their intentions to become citizens of the United States, and who, since purchasing the same, have been naturalized in conformity with the laws of the United States on that subject, shall be as valid to all intents and purposes, and shall be construed to vest the title to the said real estate in the purchasers, as fully and absolutely as if they had been citizens at the time they purchased the same.
68 P.S. § 29