BULLETIN OF THE 
USDEPARIMENT OPAGRICULTURE * 
No. 257 
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IS oy 
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, 1914. 
CONTENTS. 
; Page. Page. 
Experiments at Lemon City, Fla............ 1 | Supplementary report of experiment made ' 
“Experiments at West Palm Beach, Fla...... 7 at Boise TdahostoiQevsioh ec aa ee 37 
Supplementary report of experiments at Supplementary report of experiment made 
Mil aranl Ray Odin kee Tel ORL ee ea Nhe 16 at Ames, Towa: 1910). 2.225 8h - eee car Ss 38 
Supplementary report of experiments on Supplementary report of experiments made 
Rockville Pike, Maryland, 1913...........-. 17 at Knoxville’, Tenn), 19L02. ye eae 39 
Supplementary report of experiments at Supplementary report of experiments made 
Washington DACs 1Gl2es invests ee os oe 22 at Youngstown, Ohio, 1909 ................ 40 
Supplementary report of experiments at Supplementary report of experiments made 
Chevy Chase: Md. 1919. 2) 2. exes hs eee 25 at Newton, ‘Mass., 1908.2... 22222-20222 42 
Supplementary report of experiments at Supplementary report of experiments made at 
Chevy Chase, Md., 1911 project............ 29 Garden City, Dodge City, Bucklin, and 
Supplementary report of experiments made Word Kans) S908ar 5) ete ene cee 43 
AeA AICa Niwa ol Olt yk See el ued ad 34 | Supplementary report of experiment made 
Supplementary report of experiments made at Bowling Green, Ky., 1907............... 44 
at New York, N. Y., and Ridgewood, N. J., 
«LES OS ace REA Sah a NT SA ee NT A 37 
EXPERIMENTS AT LEMON CITY, FLA. 
OILS, TAR PREPARATION, CALCIUM CHLORIDE-CORALLINE ROCK.! 
_ The second series of experimental bituminous treatments of coral- 
line rock roads in Dade County, Fla., under the direction of the 
United States Office 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 of the oils remaining from 
Notr.—This bulletin reports the results from a number of experiments in dust prevention and road 
preservation conducted by the Office of Public Roads in 1914. The materials used and methods employed 
in the experiments, the several kinds of roads and varying conditions of traffic, and analyses of materials 
and cost data are given. 
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1 Information regarding a similar series of experiments constructed at Miami, Fla., in 1913, will be found 
in Bulletin of the United States Department of Agriculture No. 105. 
93332°—Bull. 257—15——1 
