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THE BOOK OF BUTTER 



lated concrete. The insulation makes it possible better 

 to retain the cold ; and the concrete, besides being a sub- 

 stantial building material, is sanitary. Fig. 54 shows 

 a butter-room in a modern cold storage warehouse. The 

 business of operating a cold storage plant is largely one 

 of renting space. This space is leased to the customer, 

 who usually draws out the product when it is needed to 

 supply his trade. Sometimes goods are placed in storage 



FIG. 54. Section of butter storage room in a modern fireproof cold 

 storage warehouse. The temperature is maintained steadily at zero 

 Fahrenheit. 



on speculation and may all be sold and taken away at 

 one time. The cold storage companies issue receipts 

 that are negotiable. Very often the refrigerating com- 

 pany acts as a commission merchant for its customers. 

 This is probable when the holder of the storage goods 

 lives in a distant part of the country. Some cold storage 

 warehouses are located in the district where the butter 

 is manufactured. Occasionally they may be on the route 

 of transit from the district of production to that of 



