Character of pavement a factor 17 Rates per man 17 Number of men required in gang 16 Unit cost according to character and kinds of pavement 17 Sprinkling 17 Bureau of Municipal Research, Milwaukee, Wis., Cost data 19 Dust prevention 17 Effect on pavement 18 Experts, opinions of 18–19 Ordinances and regulations 20 Practices in various cities 21 Sprinkling by railway companies 20 Methods 22 Patrol system 22 Area a sweeper can clean 22 Philadelphia’s system 24 Machine Sweeping 24 Cost 26 Experts, opinions of 25 Los Angeles, Cal., report 28 Oakland, Cal., experience of 27 Pomona, Cal. 28 Flushing 29 Atlanta Sanitary Dept., report of 29 Bureau of Municipal Research, Milwaukee, Wis., report of cost data 31–32 Experts, opinion of 29–30 Effect on pavement 31 Machine 30–31 Railway car flushing 32 Hose Flushing 33 New York City, experience of 33–34 Squeegeeing 34 Horse drawn squeegees, cost of operation 35 Methods 34 Milwaukee, report of 35 Motor drawn squeegees 35–36 Square yards per day cleaned 37 Combination of methods 37–38