F1Provided, that not more than thirty acres of arable land, nor more than one hundred acres of lands consisting of hills or other grounds incapable or improper by their nature for culture by the plough, of such entailed estates, lying together in one place or plot, shall be given in exchange; and that an equivalent in land, contiguous to the entailed estate with which the exchange is to be made shall be received in place of the land given in exchange: and for ascertaining and adjusting the value of the lands proposed to be exchanged, an application shall be made for that purpose by the proprietor of the entailed estate, to the sheriff or steward of the county within which the entailed estate is situated, who thereupon shall appoint two or more skilful persons to inspect and adjust the value of the lands proposed to be excambed or exchanged; and upon such persons settling the marches of the lands proposed to be exchanged, and reporting upon oath that the exchange will be just and equal, the sheriff or steward may, and is hereby required to authorize the exchange to be made by a contract of excambion; and which being executed and recorded in the sheriff or steward books within three months after the execution thereof, the same shall be effectual to all intents and purposes; and the land given in exchange to the entailed estate shall be held to be a part thereof, and shall be subject to all the prohibitory, irritant, and resolutive clauses of the entail, in the same manner as if it had been originally a part of the estate; and the lands given from the entailed estate shall from thenceforth be held as out of the entail and be liberated from all the prohibitory, irritant, and resolutive clauses thereof.