382 Report of thp: Horticultural Department of the 



is unique and suggestive, although as now arranged it is open to ob- 

 jection on several points. The tank is partly filled with the spraying 

 liquid, and then air pumped in until the requisite pressure is reached. 

 The liquid is drawn from below for spraying". The tank holds about 

 150 gallons, is of galvanized iron and cost $41. It is mounted on a 

 common wide tire wagon and set on bed pieces on bolster springs 

 in front, but there are no springs behind. An inch pipe in the top is 

 used for filling, and on the side of it a gauge is set. The outfit 

 weighs about 1600 pounds with one man, the tank alone about 300 

 pounds. The pump was made by a local mechanic from an old 

 Goulds pump. It is geared to one wheel and is of the oscillating 

 cylinder type. The cylinder oscillates as the piston is raised and 

 lowered. In practice about 130 gallons of liquid are put into the 

 tank, and the pressure is raised to about fifty pounds before the pump 

 is started. Power is kept up by spraying only one way through the 

 orchard and then driving back to get up power. Two horses handle 

 the outfit easily. 



The Niagara gas sprayer (Figs. 47 and 48) consists essentially of 

 a steel tank of 50 to 250 gallons capacity to contain the spray liquid, 

 and a wrought iron tube containing carbonic acid gas compressed 

 under a pressure of 1500 lbs. to the inch to supply power. The tubes 

 of compressed gas are purchased from manufacturers in cities or 

 large towns. When empty the tubes are returned. The tube only 

 is shown in Fig. 47. The agitator is of the independent whirling 

 paddle type and works through the top of the tank. The merits of 

 the machine are lightness, entire saving of the power used in pump- 

 ing and constant readiness of the power for use. But the machine 

 has not been sufficiently tested to determine its value in the orchard. 

 The outfit is sold separately or mounted as shown in the Fig. 48. 

 It is supplied with or without kerosene-spraying attachment. The 

 tower shown in Fig. 48 is of steel. An 8-foot tower is said to weigh 

 only about 100 lbs. The railing around the platform of the tower 



