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 V entilating 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. 
