Police and sanitary purposes. That all that portion of section number thirty-five (35) laying west of the Minnesota River, all in township one hundred and twelve (112), range twenty-six (26), be, and the same is hereby, attached to the City of Le Sueur and included within the corporate limits thereof for police and sanitary purposes only, and the said City of Le Sueur shall have and possess all police and sanitary powers over the territory described in Appendix A, which are now possessed by said city under its charter over the incorporate limits of said city.