IOO 



DAIRYING 



into the ice storage room. This ice is packed closely, no saw- 

 dust is used, but it freezes into one immense block insulated by 

 the walls of the building, but kept away from the walls by 2x6- 

 inch strips ; concrete girders 4x10 inches are built in the concrete 

 floor, and across these girders are laid 2x6-inch timbers on which 

 the block of ice rests. 





cm 

 en 



CZ3 



cm 



Plate 44. Elevation of combination ice and dairy house. 



The cold air passes through the space between the girders 

 to the floor of the refrigerator, which is made of narrow plank 

 about 1 inch apart, and so built that it may easily be removed and 

 cleaned. 



In building this or any other arrangement for a dairy house 

 and cold room it is well to have a clear understanding of some 

 of the general principles concerning insulation, weight of ice, 

 dryness of the air, etc., etc., and then work out a plan suitable 

 for each locality. 



845. There are at least three ways of supplying the low 

 temperature for a cold room, which is so necessary for handling 

 dairy products in hot weather: First, by means of an "ice ma- 

 chine ' ' ; second, by using a mixture of ice and salt which is held 

 in a series of cylindrical metal storage tanks at one side of a room, 

 and third, by the use of ice alone. 



The cost of this reduced temperature will depend to a large 

 extent on the location of the dairy. It will be readily understood 



