166 REPORT OF THE STATE BOTANIST. 
EXPLANATION OF PLATES. 
Puate XVI.—Ground plan of power sprayer showing arrange- 
ments of parts except tool box. Drawn to scale of one-half 
inch to the foot. 
Puate XVII. Fie. 1.—Ground plan of front truck. 
Fig. 2.—Diagram of pump with connections to tank and 
nozzle carrier. Arrows indicate direction of flow also points 
of connection to other figures. . 
Fig. 8.—Diagram of qne-half of carrier, rear view, showing 
arms. 
Fic. 4.—Diagram of side view of arms and vertical supply 
pipe. All parts except arms drawn to scale of one-half inch 
to the foot. 
Pirate XVIII.—Lear side view of sprayer showing arrangements 
of parts of carrier and rakes with their supports. 
Prats XIX.—Same as Plate X VIII with carrier elevated to show 
parts more plainly, especially attackment of brake bar to 
carrier and horizontal supports, together with anchorage to 
side. ) 
Pratr XX.—Side view of carrier and rakes elevated, side view 
of pump showing sprocket, also connection with shaft. In 
addition showing side view of crches with their braces. 
Puate X XI1.—Machine at work in field spraying two rows at a 
time. 
