It shall be the duty of the superintendents of the poor of the several counties of this state to send or cause to be sent to said school all such persons as are entitled to admission therein, who are a charge upon their respective counties or any township therein. Such superintendents of the poor shall, before sending any pupils to said school under the provisions of this section, cause them to be decently and comfortably clothed, and shall provide them with comfortable clothing while they remain at said school, and defray their traveling expenses in going to and returning from said institution, and provide them with such articles of necessity and convenience as are required by the rules and regulations of said school to be furnished by the pupils therein, and shall also pay the board of such pupils during the usual annual vacation, if they are permitted to remain at said institution during such vacation. All persons entitled to admission to said school who are not a charge upon any county, but who, on account of their poverty, are unable to furnish themselves with proper clothing and other articles required by the rules and regulations of said school, shall receive the same aid from the superintendents of the poor of their respective counties while attending said school as is provided in this section for those who are a county charge. All expenses incurred by the superintendents of the poor under this section shall be a proper charge against their respective counties and shall be defrayed out of the poor fund of such county.