16 BULLETIN 257, U. S. DEPARTMENT OF AGRICULTURE. 
The following table shows the results of a traffic census taken be- 
tween 6 in the morning and 12 midnight on three successive days in 
January, 1915. 
_Tasie 9.— Volume and character of traffic over experiments at West Palm Beach, Fla., on 
three successive days in January, 1915. 
Saturday, Sunday, Monday, 
Jan, 23.1 Jan. 24.2 Jan, 25.3 
Aver- 
Vehicles. ea SES Se pS, ; age per 
North- | South- | North-| South- | North-| South-| 4Y- 
bound. | bound. | bound. | bound. | bound. | bound. 
loaded. 1-horse wagons\--.-= =.= 3s --- ee 7 6 2 1 3 7 8.7 
Wnloaded-horse wagons = 2s ee ee 4} 4 f 3 2 7 8.7 
doaded) 2-Norse WagONS = 252-2 ioe se noe sal- 5 2 1 1 5 0 4.7 
Unloaded 2-horse wagons..........-----..-.-- 4 2 0 20 1 4 7) 
i-horse pleasure vehicles. === 5-222 522-255 3 4 1 2 2 2 4.7 
MOLOn CYCleS 22ers eres eee eee 15 19- 12 10 16 15} - 29.0 
Motorrunabouls=< 2 ossce ce a ee a eee 11 14 0 3 8 14 13.3 
Motor TOULINg Cars.--2 5525-22. S22 eS ee 127 114 - 82 84 97 102 202.0 
ioaded mo tor trueksSseee so s2ee ace eee eee 1 2 0 0 1 3 2.3 
Unloaded an otor trucks se eae eee 1 1 1 1 3 0 23 
IBMOVOGRarsn pce ooso basacoce Soopedbocdde odor a5 101 141 49 65 118 130 201.3 
1 Heavy rain morning and evening; showers all day. 
2 Heavy rain 6 to 7a. m., 12 to6 p. m.; showers balance of day. 
3 Heavy rain 10 a. m. to i p. m.; showers balance of day. 
SUPPLEMENTARY REPORT OF EXPERIMENTS AT MIAMI, FIA., 1913. 
OIL-CORALLINE ROCK. | 
The original report of these experiments will be found in U. S. 
Department of Agriculture Bulletin No. 105. When inspected and 
repaired on January 29, 1914, the surface treatment in experiments | 
Nos. 1 and 2 had worn so badly that repairs were out of the question. 
It had broken through in a number of places, exposing the soft under- 
lying rock to excessive wear, and this finally resulted in such a rough 
and objectionable surface that both sections were later scarified, 
reeraded, and rolled without further treatment. The remaining 
experimental sections were repaired where necessary by patching all 
holes and breaks‘in the surface in the following manner: : 
The surface was cut away around the affected areas to form holes 
about 4 inches deep, with straight, sharp edges. These were filled 
with a thorough mixture of pit-run rock and the light-oil product, 
with care to use only sufficient oil to coat all the particles. The mix- 
ture was tamped in place in layers about 1 inch thick. The following 
table shows the extent and cost of these repairs: 
TaBLe 10.—Cost of repairs to experiments at Miami, Fla. 
Area of 
Cost per 
Experiment No. patches Cost. caine 
(square yard 
feet) 
Bho a5 RAE Se SSS eR Se Se Qa ae ae ve eo) RTE HTC 0 $0. 00 $0. 000 
hy tty ta ah a a aE UU GAO a Ges eM ME OORT re 3 .89 002 
a tS me pe Naty nc nee een nn are ion ain, Pz pete, cee a | 24 dake: 013 
Ce ee Sen etl SO ome a GES 2 Noman eee 0 . 00 000 
