10 April, 1916.] 



Apple Drying. 



203 



Plate 1. Ground plan of evaporator, showing fire-box, and 8-in. 

 flue pipe, which heats drying chamber, with a reduced outlet to 4|-in. 

 pipe, with a damper to regulate draught and conserve heat. This 

 method of heating the drying chamber reduces fuel to a minimum, and 

 prevents the products of combustion coming into contact with the 

 drying fruit. 



While drying is in progress, it is necessary to provide for the admis- 

 sion of fresh air to the chamber, and at the same time maintain, as far 

 as possible, evenness of temperature. For this purpose, instead of 

 employing the ordinary air vents, two 3-in. galvanized iron pipes, 6 feet 

 long, are employed. They are inserted in the brickwork in close 

 proximity to the fire-box; in consequence of this, they are continually 

 heated, and being slightly elevated at the delivery end, the air enters 

 the chamber in a heated condition; this produces the desired effect. 



Plate 2. Longitudinal section, shows one course of bricks on the cross 

 as foundation for 4i-in. brick wall, which supports the woodwork, fire- 



f/G.5. 



FIG.I. 



Trays Covered Wil-h 'AXalyd Wire Nelt^ 24-"H/ide Lacquer&d 

 Stretched on broad Oregon L attts 



Plate 5. 



box, and 8-in. flue from same, with brick supports. The dotted lines 

 represent the 3-in. vent pipe for the admission of fresh air. Centre 

 partition of 6-in. x |-in. T. and G. lining forming centre portion of the 

 evaporator rests on _|_ iron, which runs full length of chamber, and 

 is supported by the brickwork at each end. Damjier is shown o{)en. 



Plate 3. Cross section, shows fire-box, flue pipe, two vent pi{>es, two 

 chambei's for trays, with partition between consisting of ^-iu. tongued 

 and grooved wood, resting on i iron, which runs full length of evapora- 

 tor, and is supported by the brickwork at each end. The weatherboard 

 wall of shed in which evaporator is erected is also shown. 



Plate 4. Front elevation. This gives a view of door of fire-box, cast 

 vent faces of 3-in. vent pipes, position of turnbuckle handles on fibro- 

 ciment doors, hinges 18 and 20 inch, the latter so placed on door as to 

 allow same to swing n<:ht around so that it may n<>t block \ip 4-ft. 

 passage, as shown in Plate 1. 



