DESCRIPTION OF PLATE XXII. 



Fig. 1 shows sulphur, Unie, and salt spray-cooking appliances used on the Rio Bonito 

 Rancho. The heavy framework at the left supports a large water tank not shown 

 in the photograpli. Tlii.« tank is filled from a well by means of a steam rotary force 

 punij), and !<upplics all water reiiuired in cooking and reducing sprays. On the 

 ground, at tlie farther side of tlu' framework of tlic tank, is shown a long wooden 

 vat from which steam is issuing. Tiiis rectangular vat, describe<l on page 159, is capa- 

 ble of cooking about 900 gallons of suli)lmr sjiray of double strength, and is seen in 

 full operation in the illustration, the heat being ai)plied by means of steam pipes at 

 the bottom. The steam pipe is shown leading from the dome of the boiler in the 

 shed at the right and in the backgroun<l of the photograph. The roun<l tank shown 

 above the right eml of the cooking vat hol<ls oOO gallons of spray, ready for appli- 

 cation to the trees. This tank is filled from the cooking vat by means of a steam 

 injector, described on page 160, and the spray is maintained at a high temperature 

 by means of steam pipes in the l)ottom, as in case of the cooking vat proper. 



Fig. 2 should be considered in connection with fig. 1. The large, round tank, 

 standing above the barrels, is the storage tank for sulphur spray after it has been 

 prepared in the long vat ])el(jw. This tank holds 300 gallons — sufficient spray to fill 

 the tank seen on the wagon. The wagon tank is filled l)y gravity, the spray flowing 

 into it through hose running directly from a spout at the bottom of the storage 

 tank. A valve in this spout regulates or stops this flow of spray as desired. On© of 

 the spray wagons used in this large orchard is shown. The pump stands crosswise 

 behind the corner stakes at the back of the wagon. These stakes serve to prevent 

 the hose from falling Ijeneath the wheels, as all lines of hose extend from the rear of 

 the wagon when in use in the orchard. 



