398 
VEGETABLE GARDENING 
tials for the successful storage of onions are plenty of 
ventilation, storing in small quantities, a comparatively 
low temperature, dryness, and safety from actual freez- 
ing. Any building wherein the above conditions may be 
secured will answer, but houses of the type shown in 
Figure 94, which are built especially for the purpose, are 
most satisfactory. 
“The construction of the storage house should be 
double throughout, with plenty of felt or paper lining. 
Both top and bottom ventilation should be provided. 
FIG. 94. ONION STORAGE HOUSE 
and the ventilator openings should have windows that 
may be closed to control the temperature. The floors are 
constructed of narrow planks with ^2 -inch spaces be- 
tween the planks for the passage of air. Bottom ventila- 
tion is frequently secured by means of drain pipes built 
into the foundation at the surface of the ground. These 
pipes are carried some distance toward the center of the 
house. They discharge the cool air at a point where it 
is most needed. 
“The temperature of the storage house should be car- 
ried as low as possible without actual freezing. During 
