PROJECTS 



587 



Flange or Collar to Cover Insulating Material. Have the tinner 

 cut a sheet of galvanized iron exactly to fit the opening of the 

 container. It should fit so closely in length and breadth that 

 it will just slip into the container so as to cover the contents com- 

 pletely. In the center of this metal sheet cut a hole just large enough 

 to allow it to be slipped over the bottom of the metal nest and fitted 

 up snugly under the rolled rim as a collar for the metal nest (Figure 

 11, D). When the nest is 



" C 



put in place, the collar 

 (Figure 10, F) covers the 

 packing, and serves the 

 important purpose of keep- 

 ing it dry. 



The Cooking Vessel. 

 This should be durable and 

 free from seams and crev- 

 ices, which are hard to 

 clean. It should have 

 perpendicular sides. The 

 cover should be as nearly 



B 



FIGURE 11. 



A, metal nest, with rolled rim, B ; C, cover ; 

 D, detachable collar or flange- 



flat as possible and should be provided with a deep rim extending 

 well down into the kettle to retain the steam. It is possible to buy 

 kettles made especially for use in fireless cookers ; these are provided 

 with covers which can be clamped on tightly. 



Tinned iron kettles should not be used in a fireless cooker, for 

 although cheap they are likely to rust from the confined moisture. 

 Enameled ware kettles, with covers of the same material, are 

 satisfactory. Aluminum vessels do not rust, and they may be 

 purchased in shapes that are especially well adapted for use in fire- 

 less cookers. 



To Pack the Box or Container. Line the bottom of the box, and 

 the sides to within four inches of the top, with 10 or 12 sheets of 

 newspaper or wrapping paper, with several thicknesses of card- 

 board, or with sheet asbestos f inch thick. Use a few tacks to 

 hold the lining in place. Shred newspaper into bits and cover 

 the bottom of the box evenly and compactly with the shredded 



