Section 10. Be it further enacted by the authority aforesaid, That it shall be lawful for the mayor, aldermen, and citizens of Philadelphia, to exercise all such jurisdiction, enact all such ordinances, and do and execute all such acts and things whatsoever as may be necessary and convenient for the full and entire acceptance, execution, and prosecution of any and all the devises and bequests, trusts and provisions contained in the said will, which are the subjects of the preceding parts of this act, and to enable the constituted authorities of the city of Philadelphia to carry which into effect, the said Stephen Girard has desired the legislature to enact the necessary laws.