36 



EGGS IN COLD STORAGE. 



Open side wall 

 Piping. 



frozen surfaces located outside of the room, or at 

 least in a position so that no radiation or conduction 

 can occur. The use of insulated screens or mantles, 

 as shown in Figs. 3, 4. and 5, is recommended as being- 

 superior to any arrangement of open piping-; but, of 

 course, it is not equal to forced circulation, in which 

 the pipes are located outside of room entirely. 



Fig-. 2 shows another very common and faulty 

 arrang-ement of piping for cooling an egg room. The 

 only improvement over the arrangement shown in 

 Fig. 1 is that it allows of a moderate action of gravity 



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f ( 



f 



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near the coils, as shown by the arrows. It is open to 

 the same objection on the ground of conduction and 

 radiation as No. 1, but to a lesser degree. The coils 

 are placed a few inches out from the walls, to allow 

 the air to circulate around the pipes freely, and to 

 provide room for an accumulation of frost. The top 

 of the coil should be quite close to the ceiling. If the 

 coil is placed, say midway between floor and ceiling 

 (unless it covers nearly the whole space), it is sure to 

 result in the air becoming stratified, a warm layer of 

 air in top of room resting on a colder one near floor, 

 perhaps to an extent so great as to cause a difference 

 of 10 F. in temperature between floor and ceiling of 

 room. A case with exactlv these conditions is on 



