UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 257 



Contribution from the Office of Public Roads 

 LOGAN WALLER PAGE, Director 



Washington, D. C 



PROFESSIONAL PAPER 



July 12, 1915. 



PROGRESS REPORTS OF EXPERIM 

 IN DUST PREVENTION AND ROAD 

 PRESERVATION, 1914 



CONTENTS 



Experiments at Lemon City, Fla. ... 1 



Experiments at West Palm Beach, Fla. . 7 



Supplementary Report of Experiments at 

 Miami, Fla., 1913 16 



Supplementary Report of Experiments 

 on Rockville Pike, Maryland, 1913 . . 17 



Supplementary Report of Experiments at 

 Washington, D. C, 1912 22 



Supplementary Report of Experiments at 

 Chevy Chase, Md., 1912 ...... 25 



Supplementary Report of Experiments at 

 Chevy Chase, Md., 1911 Project . . . 29 



Supplementary Report of Experiments 

 Made at Jamaica, N. Y., 1911 . ... 34 



Supplementary Report of Experiments 

 Made at Neiv York, N. Y., and Ridge- 

 wood, W. J., 1910 37 



Page 

 Supplementary Report of Experiment 



Made at Boise, Idaho, 1910 37 



Supplementary Report of Experiment 



Made at Ames, Iowa, 1910 38 



Supplementary Report of Experiments 



Made at Knoxville, Tenn., 1910 ... 39 

 Supplementary Report of Experiments 



Made at Youngstown, Ohio, 1909 . . 40 

 Supplementary Report of Experiments 



Made at Newton, Mass., 1908 ... 42 

 Supplementary Report of Experiments 



Made at Garden City, Dodge City, 



Bucklin, and Ford, Eans., 1908 ... 43 

 Supplementary Report of Experiment 



Made at Bowling Green, Ky., 1907 . . 44 



WASHINGTON 



GOVERNMENT I'KINTING OFFICE 



I9U 



