Bui. 480, U. S. Dept. of Agriculture. 



Plate VI. 



1 3 



Comparison of Details of the Old and the Improved Types of Nozzles. 



Fig. 1.— Old type nozzle, a, Shut-off open; b, Hopkins; c, square top of Hopkins; d, taper 

 at base of tip. Fig. 1A. — Square waterway in shul-off; a, opening of pipe above and below 

 shut-off; b, rectangular opening in shut-off; c, protruding shoulder in shut-off when open. 

 Fig. IB —Cross section of tube and Hopkins, showing Hopkins loose in the chamber of the 

 nozzle. 



Fig. 2.— Base of "vt'orthley nozzle, a, Swivel handle; 6, shut-off handle; c, shut-off closed; 

 d, base of tube of nozzle. Fig. 2A.— Clear waterway in shul-off when open. Fig. 2B.— 

 Details of the shut-off; a, shul-off open; b, nut; c, shut-off handle; d, washer. 



Fig. 3.— Tip of Worthley nozzle, a, Method of holding Hopkins in position in top of tube; 

 6, top of Hopkins leveled to sharp edge; c, condensing head in end of tube; d, beveled 

 base of Hopkins; e, protecting shoulder. Fig. 3A.— Cross section of tube and Hopkins. 

 a, Hopkins firmly held in place at top of tube. (Original.) 



