16 



BULLETIlSr 420, V. S. DEPAETMENT OP AGEICIILTTJEE. 



While the difference in temperature between the top and bottom 

 bottles was decreased to a certain extent by reversing the air, still 

 there was too great a difference for satisfactory operation commer- 

 cially, as there is a possibility that some of the bottles are not properly 

 cooled. Furthermore, the arrangement of piping, in order to provide 









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Fig. 10.— <3oolnig by forcing air alternately from bottom and top.— Difference in temperature of bottles at 

 different positions in stack. Air reversed in direction every 15 minutes. 



for the reversal of the direction of the air through the crates, was 

 more or less complicated and would involve an increased cost in the 

 installation of the dampers so as to change the direction of the air 

 for cooling on a commercial scale. 



