366 Report of the Horticultural Departinient of the 



berries, etc. The tank is in the form of a drum and rolls like a roller. 

 Its width is 19 inches and its capacity 65 gallons. The extreme width 

 of the outfit is 32 inches, thus allowing it to be drawn between rows 

 of high plants in the field. The round tank itself rolls, dispensing 

 with wheels or wagon. The rolling necessarily affords agitation. 

 The outfit is supplied with pump, nozzles, etc. 



The Field Force Pump Co. manufactures three patterns of two- 

 wheeled outfits similar in principle to the Brown outfits but having 

 upright circular tanks. One of these is shown in Fig. 37. Both these 

 and the Brown outfits are adapted for spraying either potatoes or 

 grapes except in the case of the Field Force Pump outfit which is 

 arranged for low crops alone. A larger Field Force Pump outfit has 

 a tank with a capacity of 150 gallons and is mounted on a four- 

 wheeled truck. The pump is connected with a chamber on the wagon 

 of twelve gallons capacity. In driving from tree to tree the pressure 

 in this cylinder is pumped up. The chamber also has a hand pump 

 connected with it for use if the pressure should run out too soon. 



The Wellhouse spraying machine is made by William Stahl. The 

 tank is three and a half feet wide, four feet two inches long and fifteen 

 inches deep. The pump is of the rotary type and is geared to a 

 sprocket wheel on one side of the rig. The power is thrown on and 

 ofif by levers. 



field-crop sprayers. 



Field-crop sprayers are made for spraying low plants such as pota- 

 toes, cabbage, asparagus, currants, gooseberries, etc. The simplest 

 form is the atomizer. This is used to a considerable extent in apply- 

 ing paris green and water to potato vines. The reservoir holds from 

 one to two quarts. Lime should be added to the water to avoid the 

 danger of burning the foliage by the poison. This apparatus is not 

 suital)le when there is any considerable area to cover as the work 

 progresses slowly and it is difficult to cover all the leaf surface with 

 the mixture. 



