32 BULLETIN 136, U. S. DEPARTMENT OF AGRICULTURE. 
in accordance with the requirements of the State highway commis- 
sioner and under the supervision of his engineers. In four counties 
in Virginia the roads are built under this plan. In Dalias County, 
Ala., the construction of bond-built roads was in charge of the four 
district commissioners and the probate judge. In Manatee County, 
Fla., the roads were built under the supervision of the five district 
county commissioners. In Lauderdale County, Miss., the county 
supervisors appointed a road commission of three members to con- 
struct the roads under the bond issue, and a highway engineer was 
employed and all work done by contract. In Franklin County, N. Y., 
the roads were constructed by the county road commissioners and the 
county superintendent of roads. In Wayne County, Mich., the roads 
were built by the board of county road commissioners, appointed by 
the county board of supervisors. 
The following table shows the mileage and cost of roads constructed 
in each county: 
TABLE 19.— Mileage and cost of roads in nine counties where bonds were issued. 
ee Bot cert "Average 
iles of tota a Her 2 
County and State. puilt. |mileage in Kind. cosiener 
county. oe 
Dallas Ala Sess ec ee ee eee eee | 197 19503)" Gravels ose. 2o2 ono spew tes See een $3, 700 
amd -Clayic cea eres cee eee 1, 650 
Manatee.eHlassaas once ee eee ees 64 1258) |Miacad amen eee cso mercer ae eee 4, 250 
| Shells... Gos Sas ye ey ge 2, 400 
Weauderdale Missi =e. 2 eee 84 1 OR5y| ea cad ame ieee eee eer ereene 6, 500 
Sand =Clay: case Vase es hee 1, 900 
SMU ANEIE LY Velscoonaauooseccascoc 41 10.0 | Graveland sand-clay...............- 2, 200 
Dinwaiddiess Vialseenee saan eee: 125 2550) SGraveland topisoilases =: ses esas 1,689 | 
BramkLimsiNi Yorn sec atcece see 124 950 |PGrawele Gos sae pees eee eee 2, 200 
Macadam ..2525 aes ee 3, 250 
WOO eeVias oe sr oe ce oe ee tenets | 84 We Pllessoe CO eae Sao nie ae ae eee 7, 400 
Marth? eraded a as eae arr ae 5, 000 
WSO Vida es cee eee 131 43.07), Maca dann ( sn. seers ee eae eee 8, 000 
Harthvorad eda se sss eee | 5, 300 
Wivenaney Silica a ee sogoodesoocode 83.5 5585 | {Concrete 22 sess scenes eee ee | 13, 200 
1 Surface treated with petroleum asphalt. 2 Kighty miles. 
In no one of these counties, with the exception of Detroit, in Wayne 
County, Mich., were there any large cities. The roads were, for the 
most part, constructed as market roads radiating from the main 
market towns in the county, as may be seen from the maps of Plates 
IV, VI, and [X. The economic benefits accruing to the several 
counties from the improvement of the roads are already apparent, 
and in several instances have been extraordinary. (Cf. Pls. V, VU, 
and VIII.) 
In Dallas County, Ala., and Lauderdale County, Miss., cotton is 
the principal crop, although in the latter county lumber is also an 
important commodity. Lumber and ties form, also, the principal 
commodity hauled in Spotsylvania County, Va. In Dinwiddie 
County the principal commodities are tobacco, peanuts, and hay; 
in Lee County farm and dairy products, hardwood, lumber, and coal; 
and in Franklin County, N. Y., milk and miscellaneous farm products, 
