BULLETIN OF THE 



ffiPMIlIOFMlTlI 



No. 257 



Contribution from the Office of Public Roads, Logan Waller Page, Director 

 July 12, 1915. 



(PROFESSIONAL PAPER.) 



PROGRESS REPORTS OF EXPERIMENTS IN DUST 



PREVENTION AND ROAD PRESERVATION, 



CONTENTS. 



Page. 



Experiments at Lemon City, Fla 1 



Experiments at West Palm Beach, Fla 7 



Supplementary report of experiments at 



Miami, Fla., 1913 16 



Suprjlementary 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 New York, N. Y., and Ridgewood, N. J., 



1910 37 



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 Youngstovm, 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, Kans., 1908 43 



Supplementary report of experiment made 



at Bowling Green, Ky., 1907 44 



EXPERIMENTS AT LEMON CITY, FLA. 



OILS, TAR PREPARATION, CALCIUM CHLORIDE-CORALLINE ROCK.i 



The second serins of experimental bituminous treatments of coral- 

 line rock roads in Dade County, Fla., under the direction of the 

 T'n )!<•<! States Of lire of Public Roads, was installed on Biscayne 

 Drive about one-quarter of a mile north of Lemon City. The bitu- 

 minous materials used were several barrels <>f the oils remaining from 



the n«iili:; from a iininiicr of < ; u is in dust prevention and road 



o/ Public Roads In 1014. The materials used and methods employed 

 (nthi I kinds of roads and varying conditions of traffic, and i lysesof materials 



1 Info experiment ooi itruoted at '■' (ami, Pla., In 1913, « 111 be found 



In Bulletin of the United States Department of Agriculture No. 105. 

 »7— U 1 



