UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 407 
ytffi Contribution from the Office of Public Roads and • S J*« 
Rural Engineering 
LOGAN WALLER PAGE, Director 
Washington, D. C. 
PROFESSIONAL PAPER 
November 10, 1916 
PROGRESS REPORTS OF EXPERIMENTS IN DUST 
PREVENTION AND ROAD PRESERVATION, 1915. 
CONTENTS. 
Page. 
New experiments 1 
Mount Vernon Avenue Road, Alexandria County, Va. (bituminous macadam; penetration and 
mixing methods; bituminous gravel concrete) 2 
Falls Road, Montgomery County, Md. (bituminous surface treatment) 24 
Bradley Lane, Montgomery County, Md. (penetration macadam) 30 
Washington, D. C. (bituminous concrete) 32 
Buena Vista, Fla. (oil-asphalt-coralline rock) 35 
Jupiter, Palm Beach County, Fla. (oil-asphalt-sand) 38 
West Palm Beach, Fla. (bituminous-sand, mixing methods) 40 
Ocala, Fla. (sand-asphalt) 41 
Supplementary reports on experiments previously reported 45 
Lemon City, Fla., 1914 (oils, tar preparation, calcium chloride-coralline rock) 45 
West Palm Beach, Fla., 1914 (oil, tar, oil-asphalt-coralline rock) 46 
Miami, Fla., 1913 (oil-coralline rock) 47 
Rockville Pike, Montgomery County, Md., 1913 (bituminous surface treatment) 48 
Washington, D. C, 1912 (tar preparation and oil-surface treatment) 55 
Chevy Chase, Montgomery County, Md., 1912 (bituminous concrete, cement concrete, oil-cement 
concrete, vitrified brick, bituminous surface treatment on concrete) 57 
Chevy Chase, Montgomery County, Md., 1911 (bituminous construction and surface treatment). . 60 
Jamaica, N. Y., 1911 (oil-cement concrete, oil asphalt, tar and fluxed native asphalt) 65 
Ames, Iowa, 1910 (oil-asphalt-gravel) 67 
Knoxville, Tenn., 1910 (tar and oil preparations) 67 
Youngstown, Ohio, 1910 (slag, lime, waste sulphite liquor and tar) 68 
Dodge City, Garden City, Bucklin, and Ford, Kans., 1908 (sand-clay) 69 
Bowling Green, Ky., 1907 (Kentucky rock asphalt) 71 
NEW EXPERIMENTS. 
The experiments begun by the Office of Public Roads and Rural 
Engineering during the year 1915 are all concerned with the use of 
bituminous materials in road construction, and include the construc- 
tion of roads surfaced with bitumen and coralline rock, bitumen and 
sand, bituminous macadam by the penetration and mixing methods/ 
1 In the future publications of this office " bituminous macadam by the penetration method " will be 
called simply bituminous macadam, and " bituminous macadam by the mixing method " will be 
called bituminous concrete. 
-Bull. 407—16 1 
