Dry Rolling. The road metals as spread shall be sprinkled with water in just sufficient quantities to moisten the cushioning below and to facilitate interlocking and rolled preferably with a three wheeled roller. . When the whole area has been rolled three or four times the camber and grade shall be checked by means of the three camber boards and fishline and a 3m(10 feet) straight edge laid parallel to the' centre line of the road. In all uneven areas observed the materials shall be thoroughly loosened by hand picking, surplus materials removed from high spots or depression refilled with fresh material and again rolled for the purpose of making of depressions small quantities of metal may be left unspread in the stacks when spreading is in progress.
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