136 SPRAY MACHINERY AND SPRAY MATERIALS 



The chief function of a nozzle is to throw a very fine spray 

 and to distribute it uniformly in all directions. A nozzle 

 clogs up easily and needs cleaning frequently for good work. 

 Spray Rod.— The spray rod is used 

 to facilitate spraying and to aid in dis- 

 tributing the spray mixture where it is 

 wanted. It affords an easy means of 

 extending the spray. The spray rod is 

 often spoken of as an extension rod. It 

 is made of bamboo and varies in length 

 from 6 to 12 feet. Each rod is lined 

 either with aluminum, brass or iron, but 

 a seamless, aluminum tubing, which is 

 screw threaded into brass connections at 

 either end is preferable. These connec- 

 tions sleeve over the end of the rod, 

 which make the joints very strong. The 

 use of aluminum tubing makes the rod 

 very light and easy to handle. The 

 bamboo extension rods are also fitted 

 with rubber drip guards which can be 

 moved up and down on the rod, and are 

 used to catch all of the moisture that 

 settles on the rod while spraying. 



Spray Gun. — The spray gun, which 

 is the most recent development in this 

 line of equipment, promises to replace 

 entirely the spray rod. This gun not 

 only saves labor and money, but is effi- 

 cient and easy to handle. It can be 

 quickly adjusted to throw either a fine or a coarse spray a 

 short or a long distance. 



Fig. 63. — Spray gun, 

 the latest and beat tool 

 for the spraying of 

 plants. This is fast 

 replacing the common 

 spray rod. 



SPRAY MATERIALS. 



The necessity of spraying is no longer doubted. It has 

 been demonstrated and proved beyond further doubt that 

 unless spraying is done it is almost an impossibility to produce 

 first-class horticultural products. The only question that 

 remains is to determine what is the proper material with 

 which to spray the plants. 



