94 MODERN FRUIT MARKETING 



low temperature is more important than any other single 

 consideration. 



In the various types of storages three methods are em- 

 ployed to regulate the temperature: (1) Ventilation. 

 (2) Ice refrigeration. (3) Mechanical cooling appli- 

 ances. The first, ventilation, is applicable to the small 

 cold storage cellars in the Northern states or to the dug- 

 out previously referred to. Ice refrigeration is used 

 mainly in the smaller storage and in the North for the 

 larger ones. Mechanical refrigeration is used almost 

 entirely in the South and in the larger public storages 

 of the Northern and Eastern states. The cost of installa- 

 tion between the ice and mechanical methods is consid- 

 erably greater for the latter. For small storage houses 

 up to 5,000 barrel capacity ice would probably be the 

 cheaper. Above that quantity the consensus of opinion 

 among storage-house men is in favor of the mechanical 

 refrigeration. 



Construction. The materials from which a storage 

 house can be built are numerous. For the cellars con- 

 structed under ground, some form of the common hard 

 building materials is used, such as stone, brick, cement, 

 hollow building tile, etc. Of these the cement and brick 

 are more commonly used. Hollow building tile, a burned 

 clay product resembling brick, is coming rapidly into 

 importance, and is considered more economical and a 

 better protection against outside cold. For the part 

 above ground, various materials are used for insulating 

 the houses against the cold or heat from the outside. 

 Wood is most commonly used, and for insulating pur- 

 poses such material as building paper, sheet cork, felt, 



