ICE SUPPLY 



Where permanent floors are put in the filling of gravel 

 or cinders should be provided and a good insulating mate- 

 rial placed in the floor. A drain should be built to carry 

 away rapidly all the water from the melting ice and this 

 drain should be trapped to prevent the entering of air. In 

 some cases the water is caught in a tank and used for cool- 

 ing purposes. The floors should slope from all directions 

 toward the center to prevent the ice falling against the walls 

 and to carry the water to the drain. 



USE GOOD MATERIALS IN BUILDING WALLS 



Having decided upon the insulating material that will 

 be the most economical, the method of placing it is the next 

 question. Several good designs are shown in Fig. 2 in 

 order as to their relative efficiency as an insulator. High 

 grade sheet material, such as cork, shows the least 

 condensation, so if they are going to be used in the wall it 

 should be placed next to the ice where the best materials 

 are needed. If some loose material, as sawdust or shavings, 

 is to be used the space in which it is stored should be divided 

 into divisions from 10 to 12 inches to prevent settling and 

 penetration of moisture. In designing a wall it should be 

 remembered that heat passes through a material of uniform 

 density more readily than through one made of successive 

 layers of different densities. 



WOOD ROOF IS BEST 



Roofs are usually of the gable type and for ordinary 

 construction 2x6-inch rafters and i-inch sheathing are used. 

 One-quarter pitch roofs are common and good shingles will 

 be found satisfactory. Either cut or zinc-coated shingle 

 nails should be used. Wire nails rust too quickly. 



BUILD TIGHT DOORS 



Doors are a weak point in the insulation of most farm 

 ice houses, and it will quite often pay to have some concern 

 which is in the business make the doors in preference to an 

 inexperienced carpenter. 



Thirteen 



