54 



IRRIGATION. 



amply sufficient time for an active man to get around a 

 plot of 200 by 200 feet. The plan here described is illus- 

 trated in figure 22. The well, with reservoir, windmill 

 and force-pump, is situated in the center of the plot to 

 be irrigated at A. From this the pipes, shown by the 

 double lines, are carried as has been described. The points 



Fig. 22. PLAN OF PIPES AND HYDRANTS. 



marked upon the lateral pipes show the positions of the 

 hydrants, and the dotted circles around a few of them 

 show the extent to which the hose covers the ground. 



A modification of this plan has been successfully in- 

 troduced in England, where it has been patented, for the 

 irrigation of meadows. In this method the distributing 

 pipes are laid upon the surface of the ground, 30 feet 

 apart, and are perforated in such a manner that the water 

 is discharged in a shower of spray upon the ground, (see 



