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184 Proceedings of Indiana Academy of Science. 
constructed as to fit in any standard electric light socket. Any convenient 
method of supplying heat by electric current may be used. It is important, 
howeyer, that only a small amount of heat be supplied. It is only necessary 
that a draft of warm air passes through the corrugated boards of the press. 
Three one inch auger holes two inches from the bottom are provided on 
each side of the box to allow for intake of air. 
The sides of the press are made of one inch boards 124% by 18 inches. 
It is best to fasten a piece one and one-half inches wide crosswise at 
either end to prevent warping. This should be tongued and grooved 
and glued. Canvas straps with friction buckles are permanently fastened 
to the boards at either end as shown in the illustration. These should 
be of such length as to allow for the maximum expansion which the width 
of the box permits with sufficient additional length to conveniently allow 
for drawing the press tight. Double faced corrugated straw boards cut so 
Fig. 1—The Plant Press in Use. 
Double faced corrugated card boards, cut so that the corrugations extend 
the short way, are used between the driers. 
Heat is supplied by two or three carbon filament electric light bulbs, or 
by special heating units constructed to fit an ordinary electric light socket. 
Any thickness of press, within the limits of the width of the box, can 
be used. Boards one and one-half or three inches wide are provided to fill 
in the space at the sides of the press on the rack when only a small amount 
of material is to be dried. 
Ventilation is provided by six one inch auger holes placed three on each 
side of the box, two inches from the bottom. Photo by M. W. Gardner. 
