474 



BOARD OF AGRICULTURE. [Pub. Doc. 



Fig. 1. 



are shown in Fig. 1. The tank is thus made tight, and with due 

 care will last for years. It is provided with a cover which fits into 

 the top, and in this cover another smaller 

 cover works on hinges, giving room for the 

 insertion of both hose and pump lever. The 

 tank may be placed on the ground or used 

 in a wagon or cart, but a truck made espe- 

 cialty for spraying trees has been designed 

 for its reception. The truck, which is shown 

 with the tank on Plate XII, Fig. 4, consists of 

 two iron wheels • 

 with wide tires, f ^SBSB S 

 supporting upon 

 their axles a heavy iron ring, 

 through which the tank is 

 raised or lowered. The tank 

 is hung within the ring on 

 four iron grapples, which 

 hook on to its lower edge. To each of these 

 grapples is attached a wire cable. These cables 



are attached to 

 drums revolving 

 on iron shafts, 



which are supported 

 above the axles on 

 either side of the 

 tank. Both these 

 shafts are turned by another 

 shaft, which is geared to them 

 by right and left worm gears 

 (see Fig 2) and has a square 

 end to which the socket of a 

 crank can be applied. (See 

 Fig. 3.) By means of this 

 device the tank can be raised sufficiently to clear ordinary obstacles, 

 and is held by a ratchet while being moved from place to place. 

 It can be lowered sufficiently to rest on the ground when in use. 



Fig. 3. 



Fig. 2. 



