the soil is anyway* retentive of moisture, the expense of these basins may be saved 

 by having pipes under the storage by means of which the earth bottom may be 

 periodically Hooded to saturation during the fall. 



The ventilation system must be complete in every derail or poor results will 

 follow. In places where " iceless refrigeration " is being used there are fruit 

 storages not adequate] y ventilated, and from the latter the fruit comes in the spring 

 in a damp and mouldy condition, with from 10 to 15 per cent, more decay in such 

 varieties as the Ben Davis, due to the air stagnarcy of the storage, notwithstanding 

 that there were no sub-storage moisture-basins as there were in the " iceless 

 refrigeration" storages. They were storing 3,000 boxes of apples, and the 10 per 

 cent, loss due to the stagnancy of the atmosphere and the higher temperatures 

 would equal the cost of the ventilating system in one year. 



Dftail of Construction of Ventilators. The cold-air intake tubes are built of 

 galvanized iron and eml>edded in the concrete wall at distances from S to 15 feet 

 to suit convenience. These should not be less than 6 inches in diameter, and may 

 be made of wood in box form if care is used in making. At the mouths, which open 

 at right angles from the upright shaft toward the outside of the building and as far 

 above the surface of the ground as the wall will allow, are flanged hoods IS inches 

 in diameter. To lit into the mouth of each tube is a cap, shown in Fig. 9. with holes 

 in its flange to regulate the amount of air that is to be taken in. By shoving the 

 cap full in the tube the air-circulation from without may be shut off entirely. 



Fig. 9. Cold-air intake and hood for ' Iceless Refrigeration." The adja- 

 cent door is used in ventilating the packing-house when it is also used as a 

 :;ige. 



The outlet or warm-air ducts are made of galvanized iron S inches in diameter 

 and spaced about 15 feet apart. Flanged hoods 30 inches in diameter are at the 

 mouths on the lower end of the ducts near the ceiling of the storage, and these 

 openings are also regulated by a cap or damper, though commonly left open con- 

 tinually except in times of very severe weather. The warm-air ducts have an elbow 

 in the ceiling, and are carried between the joists to the outside of the building and 

 connected to a space between the studding and rafters, which is well ceiled and 

 serves the purpose of an air-duct. In large storages where more draught is required 

 to carry off the warm and foul air, the outlet ducts should be from 12 to 15 inches 

 in diameter, and should rise direct from the hoods to the ventilator-stacks on the 

 roof. Thus, having larger outlet ducts, it is not necessary to have as large a number 

 of them as of intake ducts, since with the latter the aim is to secure an equal 

 distribution of cold air in all parts of the storage: 



Bill of Material for Construction. 



yds. gravel. 

 50 Mils, cement. 



IS 



