- 7 - 



Table 2.— Effectiveness of vacuum-cooling vegetables with medium 

 surface area-to-volume ratio 











Duration 















of 



Temperature of commodity at' 





y 







vacuum 



Beginning 



End of 



Commodity 





Container 



cycle 



of cycle 



cycle 











Minute s 



°Fo 



U F. 



Artichoke 







Crate 



16 



66 



50 



Asparagus 2/ 







Bunch 



10 



6k 



36 



Beans , snap 







Hamper 



20 



80 



60 



Beans , snap 







Hamper 



12 



69 



h$ 



Beans 3 snap 







Cellophane bag 



lit 



70 



h3 



Broccoli 







Wirebound crate 



20 



65 



U5 



Broccoli 







Crate 



13 



67 



hk 



Cauliflower 







Crate 



20 



76 



hh 



Cauliflower 







Crate 



13 



62 



U6 



Celery 







Cellophane bag 



20 



68 



U2 



Celery 3/ 







Cellophane bag 



20 



66 



U7 



Celery " 







Crate 



13 



70 



U7 



Celery 







Crate 



13 



77 



^3 



Corn, sweet. 



husked 



2/ 



Cellophane tray 



10 



59 



36 



Corn, sweet, 



husked 





Cellophane tray 



10 



75 



39 



Corn, sweet, 



unhuskt 



Crate 



20 



83 



h3 



Leeks 







Wirebound ciate 



20 



68 



36-1*0 



Mushrooms 







Basket (9 lb.) 



20 



67 



39 



Mushrooms 







Basket (9 lb.) 



16 



66 



35 



Mushrooms 







Basket (9 lb.) 



15 



70 



k$ 



Mushrooms 







Carton (3 lb.) 



15 



69 



k6 



Mushrooms 







Prepackaged 5/ 



15 



68 



U3 



Mushrooms 







Prepackaged b/ 



15 



70 



U5 



1/ See footnote 1, table l c 



2/ Vacuum was drawn with experimental equipment to 3«3 mm. mercury (measured 

 with a McLeod gage) at which point water boils at 25° F. Ice formed on spears 

 of asparagus, but none on sweet corn, 



3/ Data from Barger (I). 



k/ Vacuum was drawn to 3.8 mm. mercury. 



5/ Six pints packed in a cellophane-overwrapped wooden basket in a master carton. 



6/ One pound cellophane overwrapped, perforated tray Q 



