DEPARTMENT CIRCTLAR 3, TJ. S. DEPT. OE AGR. 



furnace built for the purpose of supplying heat. For smaller stoves 

 or for use over oil stoves, change dimensions to correspond to sur- 

 face of stove. Where large community driers are needed, this drier 

 can be enlarged to suit conditions, or it may be made in sections 

 each of the same size as given in the following instructions : Base 

 24 by 16 inches; height, 36 inches. A base 6 inches high is made of 

 galvanized sheet iron. This base slightly flares toward the bottom 

 and has two small openings for ventilation in each of the four sides. 

 On the base rests a boxlike frame of 1 or 1-J inch strips of wood 

 J inch wide. The two sides are braced with 1J inch strips -J inch 

 wide which serve as cleats on which the trays in the drier rest. These 

 are placed at intervals of 3 inches, and are cut to fit the uprights 



so they are flush with the 

 outside. There should be 

 no open space between side 

 covering and cleats where- 

 by heat can escape instead 

 of passing over and 

 through the products to be 

 dried. The frame is cov- 

 ered with tin or galvanized 

 sheet iron which is tacked 

 to the wooden strips of the 

 frame. Thin strips of 

 wood or plaster boards may 

 be used instead of tin or 

 sheet iron. The door is 

 fitted on small hinges and 

 fastened with a thumb 

 latch, and opens the full 

 width of the drier so that 

 the trays can be easily re- 

 moved. The bottom in the 

 drier is made of a piece of perforated galvanized sheet iron. Two 

 inches above the bottom is placed a solid sheet of galvanized iron 

 three inches less in length and width than the bottom. This sheet 

 rests on two wires fastened through the sides of the drier. This 

 prevents the direct heat from coming in contact with the product and 

 serves as a radiator to spread the heat more evenly. 



The first tray is placed 3 inches above the radiator. The trays rest 

 on the cleats 3 inches apart. A drier of the given dimensions will 

 hold eight trays. The frame of the tray is made of 1-inch strips on 

 which is tacked galvanized screen wire, which forms the bottom of 

 the tray. The tray is 21 by 15 inches, making it 3 inches less in depth 

 than the drier. The lowest tray when placed in the drier i- pushed 



Fig. 1. — A metal-covered cabinet type of homemade 

 drier. 



