AGRICULTURAL EXGINEERIN'G. 



161 



hauling on the public roads of $946,414,665. Nearly, if not 

 quite, two-thirds of this vast expense may be saved by road 

 improvement, and this at a total cost not exceeding the 

 losses of 3, or at most 4, years by bad roads (Circ. 19, Office 

 of Road Inquiry, U. S. Dept. Agr.). 



LABOR ONE HORSE IS ABLE TO PERFORM 



at different rates of speed on canals, railroads, and 

 turnpikes. (Drawing force, 83^ lbs.) (Waring.) 



PERFORMANCE OF ONE TEAM AND PLOUGH IN 

 A DAY, IN ACRES AND TENTHS. (Waring.) 



