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On all streets where the vridth of said streets between property lireE is less than forty (40) feet, the above m.er,tioned distance shall be six (6-) feet. Section 3. The cement concrete for cement curbs and gutters air -all be composed of one (1) part of Portland Cement; Three (3) parts of siznd or atone screcninge; Five (5) parts of broken stone. Cement. The cement used shall be of such duality as to conform to the requirements of Ordinance No. l of the City of Calton. Sands All sand must be free from oil or organic matter and must con - twin not more than five (5j,) per cent by volume of clay or silt. ?ot less than ninety (91*) per cent by volume of the sand shall pass a screen having four (4) meshes to the linear inch, and at least fifty (50%) per cent, but not more than eighty-five (850) per cent by volume, shall be retained on a. screen having thirty (30) meshes to the linear inch. Broken Stone. Broken stone shall be the rur of the crushers except however, that none of t_e stone shall be of greater size than will pass a ring two (2) inches in diameters and not more than ten (10%) per cent shall be of greater size than will pass through a ring one and one- half (1j) inches in diameter. Gravel. In place of broken stone, gravel may be used, provided in all cases that the gravel is satisfactory in quality to the Sup- erintendent of Streets and the: City Engineer, and provided further that the relative proportions of cement and gravel shall be deter- mined by the City Engineer. Contractors must in all cases submit samples of cement, sand,, and broken store or gravel, free of charge to tre City Engineer, who shall examine sage and either pass or reject it.