The Treasurer may sell the real estate belonging to said funds; and he may sell at private or public sale, from time to time, all or any part of the real estate belonging to the state, acquired by deed or foreclosure of mortgage for the School Fund or the Agricultural College Fund, if he deems it advisable and for the interest of said fund. The loss, if any, that occurs from the sale of such property, either at public or private sale, shall be deducted from the principal of said funds. The Treasurer shall execute, under the seal of his department, all necessary deeds of conveyance of real estate and releases of mortgages or judgment liens relating to said funds. The Secretary may take the acknowledgment of all conveyances of real estate situated out of the state, belonging to said funds, and affix the seal of the state to his certificate thereof.