COLD STORAGE FOR APPLES AND PEARS 



55 



€te 



U 



A 



B 



Figure 24.— Psychrometers consisting of wet- and dry-bulb thermometers that 

 can be used for determining the relative humidity of storage rooms : A, Sling 

 type ; B, wall type ; G, hand-aspirated. 



ments are available for this purpose (fig. 24). When type A or type 

 C psychrometers are used the relative humidity may be found bv 

 reference to table 8. 



