When the council shall deem it for the public interest, grounds and buildings for city prisons, workhouses and other necessary public uses, may be purchased, erected and maintained beyond the corporate limits of the city; and in such cases the council shall have authority to enforce, beyond the city limits and over such lands, buildings and property in the same manner and to the same extent as if they were situated within the city, all such ordinances and police regulations as may be necessary for the care and protection thereof and for the management and control of the persons kept or confined in such prisons, workhouses or hospitals.