Section 17. And be it further enacted by the authority aforesaid, That the sheriff and commissioners of the county of Allegheny, shall provide one wheel for jurors for the trial of causes in the said city, and the like proceedings shall be had by the aforesaid officers in the selecting, depositing, drawing and summoning and returning jurors, as is provided for the county courts, and the jurors shall be compensated out of the county stock; but the selection of said jurors for the court, shall be made from the citizens residing within the bounds of the said city.