TRANSPORTATION 141 



facts: (1) The box system is more cheaply installed 

 and operated, and (2) the fruit is more easily cooled 

 down before loading in the cars than it is afterwards. 

 The car system of pre-cooling is so expensive that it 

 can only be installed in centers of production or at the 

 best shipping points. In such cases it is necessary to 

 load the fruit into the cars during the day or evening 



Fig. 105. PACKAGES OF FRUIT READY FOR THE POSTMAN 



from each of the warehouses and then run direct to the 

 different cooling plants. Here they are cooled down 

 during the night, and in the morning sent off on their 

 journey. This means that from 5 to 24 hours must elapse 

 from the time the fruit is placed in the cars until it is 

 properly cooled down for shipment. In the hot climates 

 of the South and the West this has been found to be too 

 long a time. 



The principle on which these pre-cooling plants oper- 



