EGGS IN COLD STORAGE. 



47 



lation of air in a cold storage room, which the writer 

 has developed after several seasons' experiment, 

 and which is regarded as very nearly theoretically 

 perfect. In practical working- it gives very superior 

 results, and is believed, by those who are using- it, to 

 be in advance of any other system now in use. By 

 referring- to the sketch it may be seen that the air is 

 forced to cover very uniformly the entire cross-sec- 

 tion area of the room a result not possible with any 

 other device. This is obtained by the use of a false 

 ceiling, b b, perforated at intervals with small holes 



/ 





v 



the "Cooper 

 system" of 

 forced air 

 circulation. 



which covers the whole ceiling of room ; and the side 

 air duct, a a, perforated with small holes on top, bot- 

 tom and sides. The air from cooling coils is forced 

 into ducts, a a, and flows out through the perforations. 

 Passing through the piles of eggs, as shown by the 

 arrows, the air moves upward through the perfora- 

 tions in the false ceiling, and thence through space 

 between false ceiling and ceiling, to cooling coils 

 again. This circulation is actuated by an exhauster, 

 or blower, preferably located on the main cold air 

 duct, between the cooling coils and cold air ducts, a a. 

 This has a tendency to put the egg room itself under 

 a slight pressure, and the coil room under a vacuum. 

 In this way the air leakage from outside, if there is 



