day. The quantity of spray applied per round trip should be Increased as the 

 frequency of the trips is reduced. This can be done by increasing the length 

 of stroke of the spray pump or adding another pump. 



HOW TO BUILD AN AUTOMATIC SPRAYER 



Dimensions for parts of the working units of the one-nozzle and two-nozzle 

 sprayers are given on pages 6 and 7. In the following paragraphs are hints to aid 

 owners of beef cattle or dairy cows in constructing and adjusting these sprayers. 



Make bottom frame of five lengths of angle iron either welded or bolted 

 together. Center crosspiece adds stability. Weld upright to middle of one side of 

 bottom frame. 



Biiild treadle of two layers of 1-inch lumber treated with creosote or other 

 wood preservative. Nail the two layers together so that boards cross each other. 



Staple coarse hardware cloth or nail cleats to top side of treadle to keep 

 animals from slipping. 



Bolt treadle loosely to frame on side opposite upright. Adjust bolts so that 

 unattached side of treadle can be lifted about 3 inches above frame. Hinges may be 

 used instead of bolts. 



Use any plunger -t37pe spray pump that will deliver a fine mist of about 

 one-thirtieth ounce of material per stroke. (Used on 1951 experimental sprayers 

 was the Z & W Model 2000 Hydraulic Hand Sprayer, because it was adequate, 

 inexpensive, and the only one of its kind available from local dealers. Manufac- 

 turer: Z & W Machine Products, Inc., 5151 St. Clair Avenue, Cleveland, Ohio.) 



Use any threaded spout that fits pump. Spouts from standard quart or pint 

 cans fit Z & W spray pump. Leave enough tin around spout to make soldering 

 easy. For small herd, quart can may be substituted for gallon can. 



If necessary, add inch or more of tygon (oil -resistant plastic) tubing to 

 lower end of spray pump. 



In bolting gallon cans to upright, adjust position of cans to fit size of 

 cattle. In one-nozzle sprayer shown on page 6, and used on beef cattle, nozzle 

 is 55 inches above depressed treadle and tilted at angle of 30 degrees. In two- 

 nozzle sprayer shown on page 7, and used on dairy cows, nozzles are respect- 

 ively 16 and 47 inches above top of depressed treadle. 



Use treadle spring that is strong enough to lift treadle when animal has 

 stepped off. 



Insert brake bolt in upright about 7 inches from bottom of upright and 

 about 2^ inches above top edge of lever when treadle is depressed. Position of 



