THE WAR GARDEN VICTORIOUS 143 



need for drying operations in each one, it is uneconomic 

 to buy. There are not enough dehydrators made to dry 

 the surplus home products of the country; shortage of 

 man-power renders an adequate development of their 

 manufacture difficult, not to say impossible. 



Mr. W. L. Feisher writes in the Journal of American 

 Society of Heating and Ventilating Engineers, April, 1918 : 



I claim that in our newer schools and in our public 

 buildings throughout the country, those things that are 

 required for the drying of food products are already at 

 hand, and that the walls of the rooms, or the corridors 

 in these buildings, eliminate the necessity of a great 

 part of the kilns themselves, and that with very little 

 ingenuity, the heating and ventilating systems in our 

 schools and public buildings can be turned into dehy- 

 drating plants in quick order. As to the actual applica- 

 tion of my idea, in most of our schools the blowers are 

 located in the basements and the main ducts leading 

 from these blowers are run through the corridors of the 

 basements in the various uptakes. It is my idea that 

 these basement corridors can be turned into tunnel 

 driers by means of wooden partitions, -or where the cor- 

 ridors are narrow enough, only cut-offs and divisions 

 are essential. The heated air can then be blown into 

 one end of the corridors and the duct blanked off with 

 a damper beyond this outlet. At the far end of the 

 corridor or tunnel, another damper can be placed and 

 an inlet located at this point, with a connection taken 

 from a point beyond the first damper back into the fan 

 so that recirculation from the fan end of the tunnel can 

 be obtained. In this way, we can create a very fair 

 tunnel drier, which according to commercial practice, 

 is the very best and most economical drier built. 



