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MASS. EXPERIMENT STATION BULLETIN mi 



There is ample material (plywood, strips, etc.) in the quantities listed for the 

 natural draft dehydrator to take care of the increased size of the forced air unit. 

 The cost of the fan is not included in the estimate. 



A dehydrator which has been found extremely useful in the laboratory for the 

 development of new products for commercial dehydration is also adaptable as a 

 relatively inexpensive "several family" dehydrator. Such an arrangement would 

 result in a substantial saving of material, and would allow for a unit of greater 

 capacity, with better control of dehydrating conditions through more elaborate 

 construction. Since steam and steam controls are available in few places, elec- 

 tric heat is generally more practical. 



Figures 5, 5a, and 6 show the batch dehydrator used for work of this type in 

 the laboratory.* The cabinet is of plywood and uses a 12-inch ventilating fan 



*Unit built by C. I. Gunness, Head, Dept. of Engineering, Mass State College. 



Figure 5. Front View of "Several Family" Dehydrator showing fan and tray arrangement. 



