88 



X. II. AGR. EXPERIMENT STATION 



[Bulletin 143 



Whatever type of nozzle is used should be attached to the rod 

 by a 35 degree connection, so that the nozzle points at that 

 angle. This enables one to spray more directly over the topmost 

 branches and under the lower ones, making the work much 

 easier and more effective than where the nozzle is attached 

 straight. 



Extension Rod. In orchard spraying an extension rod is a 

 necessity, especially with the tall trees usual 

 in New Hampshire orchards. Some of these 

 consist of a bamboo rod enclosing a light brass 

 tube, and fitted with thread for the nozzle at 

 the tip, and with a shut-off or stop cock at the 

 lower end, so that the stream may be cut off 

 when moving from tree to tree and the pres- 

 s u r e m a i n- 

 tained. These 

 are light and 

 easy to handle, 

 but the bamboo 

 and connec- 

 tions frequently 

 break, so . that 

 many prefer 

 using a straight 



Fia. 20.— Long nipple hose coup- 

 ling, and hose attached, showing 

 double band on each side. 



m 



Fi G . 19. — Bamboo 

 rod with drip guard 

 and stop cock, and 

 iron rod with wooden 

 hand grips. 



piece of % or i/o-inch 

 galvanized iron pipe, threaded at one end for 

 the nozzles and at the other for a stop cock. 

 Wooden hand grips may be wired around the 

 pipe, which will make it easier to hold. Ten 

 feet is a good length. 



Hose. It is economy to get the best half- 

 inch hose (inside measure) and to have i)lenty on hand. Make 

 the joints as firm as possible, and see that the shanks to the noz- 

 zles and fittings are long enough so that the hose clamps will 

 grip them firmly. So-called double-length couplings (Fig. 20), 

 which permit the use of two clamps on each side of a joint, are 

 satisfactory. A single clamp will not hold a high pressure. A 

 few firms are offering improved hose couplings, but there is 

 much room for their improvement. Nothing is more disagree- 

 able than the constant breaking of couplings, with the incidental 



