390 



DRAUGHT OF HORSES. 



At 8 hours per day, 2\ miles per hour, and tractive force of 150 Ibs. : 

 On level hard road ... ... ... ... ... 3 tons. 



On inferior or hilly road ... ... ... ... i ,, 



On rails 16 



On a canal 60 to 90 ,, 



Carrying on his back ... ... ... ... 300 Ibs. 



Lifting over a pulley ... ... ... ... no ,, 



Length of furrow : 250 yards long is the best average suited 



to the strength of horses. 



Speed of horses : From i ]/ 2 to 2 miles per hour while in the 



plough. 



Distance travelled per acre : At a width of 8 in., 12*3 miles ; 



at a width of 9 in., n miles ; at a width of 10 in., 9^9 miles ; at a 



width of 12 in., 8*2 miles. 



Average time to turn : Three quarters of a minute. 



Time lost in turning : For 250 yards length of furrow, the loss 

 is i hour 30 minutes every 10 hours. 



