The duties of the said board of managers shall be to provide a house or houses, by leasing the same or otherwise, for the reception of children to be placed therein under the provisions of this act, to alter said house or houses for such purpose, to keep the same in repair, and generally to fit and furnish said house or houses so that the same may be suitable for the care of the children intended to be received, and especially to arrange such house or houses so that a separate room (so far as possible) may be provided for the accommodation of each child who may be received therein, and generally to supervise and oversee the management of said house or houses.