498 FARM AND SCHOOL PROBLEMS. 



Reading on Silos. 



BOOKS. 



1. Silos and Silage Miles. 



2. Physics of Agriculture (Pages 394-427) King, 8-12 F. H. King, 

 Madison, Wis. 



3. Soiling Crops and the Silo Shaw, 8-12 Wefbb Pub. Co., $1.50. 



FARMERS' BULLETINS u. s. DEPT. OF AGRICULTURE. 



292. Cost of Filling Silos. 



556. The Making and Feeding of Silage. 



32. Silos and Silage. 



222. Silage for Cows. 



STATE BULLETINS. 



193. The Silo for Missouri Farms Missouri Agricultural Ex. Station 



141 . Modern Silo Construction Iowa Experiment Station 



1 17 . The Iowa Silo Iowa Experiment Station 



The Michigan Silo Michigan Experiment Station 



112. Corn Silage for Fattening Two-Year-Old Steers, Missouri Ex, 



Station. 

 182. Silo Construction Virginia Experiment Station 



Roads. 

 SUMMARY OF BULLETIN NO. 41. 



OFFICE OF PUBLIC ROADS, UNITED STATES DEPARTMENT OF 

 AGRICULTURE. 



Title: "Mileage and Cost of Public Roads in the United States in 1909." 



STATISTICS ON ROAD MILEAGE. 



1904. 1909. 



Total mileage of all public roads in U. S 2,151,379 2,199,645 



Total mileage of all improved roads in U. S.... 153,530 190,476 



Percentage of all roads improved 7.14 8.66 



Total mileage of stone roads in U. S 36,818 59,237 



Total mileage of gravel roads in U. S 109,905 102,870 (a) 



Total mileage of sand-clay, brick, bituminous- 

 macadam and other improved roads in U. S. 6,806 28,372 



