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



PLATE VI. 



COMPARISON OF DETAILS OF THE OLD AND THE IMPROVED TYPES OF NOZZLES. 



FIG. 1. Old type nozzle, o, Shut-off open; 6, Hopkins; c, square top of Hopkins; d, taper 

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

 shut-off; ft, 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 Worthley nozzle, a, Swivel handle; b, shut-off handle; c, shut-off closed; 

 d, base of tube of nozzle. FIG. 2A. Clear waterway in shut-off when open. FIG. 2B. 

 Details of the shut-off ; a, shut-off open; 6, 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 Hopldns; e, protecting shoulder. FIG. 3A. Cross section of tube and Hopkins. 

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



