Provided always, and be it enacted, That the Sheriff of the County of Edinburgh in entering the Names of Jurors, as well in the General as in the Special Jury Book as aforesaid shall divide the same into Three separate Parts, one containing the Names of Persons residing in the City of Edinburgh and its Environs, in so far as the same are comprehended within the Bounds of Police, as defined by an [3 G. 4. c. lxxviii.] Act passed in the Third Year of the Reign of His present Majesty intituled An Act for watching, cleansing, and lighting the Streets of the City of Edinburgh and adjoining Districts, for regulating the Police thereof, and for other Purposes relating thereto ; another Part containing the Names of those residing in the Town of Leith and its Environs, as comprehended within the Bounds of the Police thereof; and a Third Part containing the Names of those residing in the rest of the County of Edinburgh ; and that the Sheriff of the County of Lanark shall in like Manner divide the Names of Jurors as aforesaid into Two Parts, the one containing the Names of Persons residing in Glasgow, including Anderston, Gorbals, and the Calton, and the other containing the Names of those residing in the rest of the County of Lanark.