The county commissioners of any county of this state having a population of not less than seventy-five thousand (75,000) persons, according to the last Decennial Federal Census, or any Decennial Federal Census hereafter taken, are hereby authorized and empowered, if they deem it necessary or expedient, to purchase a farm and to construct, establish, equip and maintain thereon, at the expense of the county, county-supervised schools and homes for neglected and dependent boys and girls of such county, under the age of sixteen (16) years, who may be appointed to such schools by the district court of such county, and to make enlargements and additions thereto from time to time. Such commissioners shall also have power to purchase farm equipment to be used in connection with such schools, to purchase materials, supplies and equipment for manual, vocational or other training or education, and to erect, enlarge, remodel, and repair such building, dormitories, residences, administration and school buildings, and barns and outbuildings as they may from time to time deem necessary or expedient.

Provided, that such county commissioners may rent a suitable site and buildings for such purpose, and purchase the necessary equipment and supplies therefor. Provided, further, that said county commissioners shall make no expenditures or contract for expenditures hereunder until a tax levy for such purposes shall have been made as hereinafter provided; and provided, further, that the district court of such county, may, in his discretion, commit dependent and neglected children to such other institutions as may be now or hereafter provided by law for such purposes, or to the care of some association or corporation willing to receive them, which said corporation or association embraces in its objects the purpose of caring for and obtaining homes for such neglected and dependent children.