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The Cornell Reading-Courses 



of the family. Two boxes must be made, one of which should be 12 inches 

 longer, wider, and deeper than the other. If the inner box is 3 feet long, 

 2 feet wide, and 2 feet deep, the outer box should be 4 feet long, 3 feet 

 wide, and 3 feet deep. 



The inner box should be: 



a. Made of matched white pine or cypress. 



b. Lined with zinc. 



c. Provided with a drip pipe in the bottom near one end and a 



metal grating across the box one foot from the drip-pipe end, 

 to make a cage for holding the ice. 



d. Enclosed by two thicknesses of waterproof building-paper tacked 



around the outside. 



The outer box should be: 



a. Made of matched lumber. 



b. Lined with two thicknesses of waterproof building-paper. 



c. Covered on the bottom 

 «rzr-^#7^^^>^ with six inches of 



cork dust or dry 

 white pine shavings. 



d. Made to connect with 

 the drip pipe pro- 

 vided in the inner 

 box. 



To make the ice box, place 

 the smaller box on the layer of 

 insulation so that the drainpipe 

 will pass from the inner to the 

 outer box. Pack the insulating 

 material (cork dust or shavings) 

 tightly in the space between the 

 inner and outer boxes. Fit a 

 board over the packing between 

 the boxes so as to make a tight 

 joint; if possible, zinc should 

 cover the joint. Hinge a thick, 

 well-insulated cover to the 

 outer box and make joints tight with weather strips and felt. 



For the cover procure a piece of matched board to cover completely 

 the outer box, and a second piece of matched board to cover completely 

 the inner box plus the layer of packing, allowance being made for sticking 





'<^mmm^miS§M' 



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Fig. 89. — An inexpensive homemade ice box 



