U. S. Dept. of Agr , Bui. 148, Office of Expt. Stations. Irrigation Investigations. 



Plate I. 



FiQ. 1.— Gas Pipe and Sprinklers Used by Fred Schumacher, 

 Flushing, Long Island. 



Fig. 2.— Movable Sprinkler Used by David Astle, Vineland, N. J. 



