186 CREAMERY BUTTER MAKING 



secure a drier and cooler air. This method of refrigera- 

 tion is illustrated in Fig. 42. The entire inside of this 

 refrigerator is finished with cement plaster making it both 

 durable and sanitary. Two dead air spaces are provided : 

 a three-quarter-inch space between the concrete and the 

 boards to which the wire lathing is fastened and a four- 

 inch space between the 2x4-inch studding. These two 

 spaces together with the four layers of paper used, pro- 

 vide a high degree of insulation. 



The concrete floor of the refrigerator is constructed 

 upon a foundation of twelve inches of cinders, overlaid 

 with hollow brick, tile, or asbestos wrapped in water- 

 proof paper. This construction provides the necessary 

 insulation. 



The floor of the ice chamber is built of 2x4~inch stud- 

 ding running the length of the refrigerator. These studs 

 are laid about three inches apart to allow the water from 

 the melting ice to drip through. Below the ice chamber 

 is a shallow pan, which catches the drip from the ice 

 and conducts it into the sewer. The pan is supported by 

 means of two 2x4-inch studs running the full length of 

 the ice chamber. Both ends of the studs are provided 

 with hooks by means of which the pan is readily attached 

 to, and detached from, the ice chamber. This method of 

 attachment is necessary to permit the easy removal of the 

 pan for cleaning. 



The refrigerator must be provided with a door having 

 at least two dead-air spaces and two flanges which fit 

 snugly into the frame of the refrigerator. 



The ice is admitted to the ice chamber through a door 

 in the rear end of the refrigerator. 



Refrigerator With Ice at End. This style of refrig- 



