MACHINERY 30 



For small masonry channels where friction is less and 

 therefore velocity greater, a fall of 1 in 300 or 400 may be 

 given. 



Discharge of channel = AxV cusecs, where A = area of 

 cross section of stream in square feet and V = average velo- 

 city in feet per second. 



Draught of carts. 



The force of traction of a cart along a level fairly metal- 

 led road is about 1/21 of the weight of the cart with load. 

 To move a loaded cart weighing one ton, with the wheels 

 well greased along such a road, will require 107 lb. 



Up a gradient of 1 in 100 the draught will increase by 

 1/100 of a ton, i.e., 224 lb. .-= total 129 lb. 



Weights and draughts of various implements. 



