Engineering and Contracting . Oil.—After the road has been prepared, theoil should be applied at the rate of ^4 to ,2 gal. per squareyard of surface. If the road has never been oiled, orif more than a season has elapsed since a previous oil-ing, it will be found that about V3 gal. per square yardwill be required. If the road or street has been oiledregularly 1/4 to Vs gal. per square yard will usually besatisfactory. It is much better to apply a small amountof oil twice each season rather than to put on the fullquantity in one application. When too much oil is ap-plied, it is not only wasted,
Engineering and Contracting . Oil.—After the road has been prepared, theoil should be applied at the rate of ^4 to ,2 gal. per squareyard of surface. If the road has never been oiled, orif more than a season has elapsed since a previous oil-ing, it will be found that about V3 gal. per square yardwill be required. If the road or street has been oiledregularly 1/4 to Vs gal. per square yard will usually besatisfactory. It is much better to apply a small amountof oil twice each season rather than to put on the fullquantity in one application. When too much oil is ap-plied, it is not only wasted, but is often very disagree-able to traffic. After a road has been oiled for several years, one lightapplication each year may be sufficient, or at least equalin results to two applications per year on a new oiledroad. The time for oiling will necessarily vary considerable,depending upon the season. Favorable times for apply-ing the oil will be about April and September. The uniform distribution of the material is one of the. Left-hand view: Oiled earth road in Pigeon Grove Township, Iroquois County; picture taken Nov. 2. 1915, about 6 weeks atier oilwas applied. Kight-liand view: Oiled earth road in Fountain Arch Township; picture taken Nov. 2, 1915, 3 weeks after oil was applied. proper drainage has been attended to. Roads that havea preponderance of heavy hauling should not be selectedfor oiling. The oiling tends to waterproof the road, butit is readily understood that continued heavy haulingeven on perfectly dry earth roads eventually will rut anddig them out in pot holes. The of oil and earthlacks stability to meet all the requirements. On mod-erately traveled roads where there is a greater amount ofpleasure travel the oiled earth roads will give betterservice. Perfection of Earth Road.—The mistake is often madeof attempting to improve a road without first gradingand draining it. When a road is graded for oiling, grav-eling, or any other form of surfacing, a pe
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