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The Cornell Reading Courses 



space between the outer box or bucket and the inner bucket with more of 



the nonconducting material, filHng the space to within about one-half 



inch from the top of the inner bucket. 



5. Make a collar of zinc, cardboard, or sheet asbestos, to cover the 



exposed surface of the insulating material. Zinc is good for this purpose 



because it does not tear with 

 constant use as do the other 

 materials, it can be washed, and 

 it does not rust. An old piece of 

 muslin, which can be washed fre- 

 quently, may instead serve the 

 purpose of keeping the insulating 

 material clean and in its proper 

 place. 



6. Make a cushion of such 

 material as muslin, which when 

 filled with the nonconducting 

 material will be at least three 

 inches thick and will, as exactly 

 as possible, fit into the space 

 between the top of the inner 

 bucket and that of the outer box 

 or bucket. This cushion may be 

 made by cutting out of the ma- 

 terial two pieces of the desired 

 shape and size, and putting them 

 together with a straight strip of 

 the desired width, with extra al- 

 lowance for seams. 



Pig. 70. DIAGRAM OF A HOMEMADE FIRE- 

 LESS COOKER 



Horizontal section: A, rim of outer bucket; B, rim 

 of inner bucket; C, collar for keeping insulator in 

 place 



Longitudinal section: A, outer bucket; B, cushion; 

 C, inner bucket; D, food container; E, insulator 



THE CARE OF A FIRELESS 

 COOKER 



The interior of the fireless 

 cooker should be kept absolutely 

 clean. It should be washed, dried, 

 and sunned, if possible, each time after being used. It should remain 

 open for several hours after use, and it should never be tightly closed 

 when not in use. The observance of these precautions prevents the 

 food from acquiring an unpleasant taste from odors or remnants of 

 food previously cooked. 



For convenience, all equipment to be used in connection with the cooker, 

 such as hot plates, hooks, racks, and cooking utensils, should be kept near 



