REFRIGERATION OF FISH 



563 



ever, where a longer haul is necessary, or in warm weather, refrig- 

 eration is required. For this purpose there are now in use truck 

 bodies refrigerated by cold-brine circulation on the principle fol- 

 lowed in the brine-refrigerated freight cars already described. 



There is a single bunker or tank at the top with brine pipes in the 

 top of the freight body. An arrangement of valves causes the brine 

 to circulate in the pipes when the truck is in motion. Ice and salt 

 are put in the bunker in proportion to give the desired temperature 



22279—27 5 



