STORAGE 



347 



The Cooper chloride of calcium process for preventing forma- 

 tion of frost on refrigerating surfaces and for drying and purifying 

 the air of cold-storage rooms is a very simple and effective improve- 

 ment. The chloride is made to perform two distinct duties — that 

 of keeping the pipes free from frost during warm weather, and 



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Transverse Section 



Fig. 155. Section of storage building shown in Fig. 152. (Courtesy of 

 Madison Cooper, Calcium, New York) 



that of maintaining the air of the storage room at its correct de- 

 gree of humidity during cold weather, at the same time helping to 

 keep the air pure. The process is applicable not only to the gravity 

 brine system but to any of the mechanical systems of refrigeration 

 in which a refrigerant is circulated through coils of pipe, or to any 

 system in which the rooms are cooled by refrigerated metal surfaces. 



