Public Highways 



285 



following figures based on actual tests will enable one 

 to see at a glance the great value of good road-beds. 

 If a horse has a load that he can just draw on a leyei 

 road of iron rails, it would require the power of one and 

 one-half horses to draw the same load on hard asphalt, 

 three and one-half on smooth block pavement, seven 

 on cobble-stone pavement, thirteen on bedded cobble 

 stone, twenty on an ordinary earth road, and forty on 

 a sandy road. 



The following table shows the results of tests made 

 with an ordinary wagon equipped with an automatic 

 scale or dynamometer, used to measure the traction, 

 or pull, in pounds: 



