Where the funds in the custody of any sinking fund commission superseded and terminated as provided in this chapter, are invested in mortgages upon real estate, the sinking fund commission herein provided for may prosecute, in its own name, foreclosure proceedings for the foreclosure of such mortgages, and where necessary for the preservation of the fund invested, purchase at foreclosure sale the real estate foreclosed upon. All such real estate shall be sold as speedily as reasonably may be.

Whenever any school district is situated wholly within a municipality, in which there is, or should be, a sinking fund commission having charge of the sinking fund of the municipality, such commission shall be the sinking fund commission of such school district and shall have the same powers and be charged with the same duties in connection with the bonded indebtedness of the school district as are conferred or imposed upon it with regard to the bonded indebtedness of the municipality in which such school district shall be situated.