EGGS IN COLD STORAGE. 33 



some time, and are very crude affairs, applied in all 

 conceivable combinations with the pipe coils. In some 

 cases canvas curtains, or a thin wooden screen, have 

 been suspended under ceiling- coils with a slant to 

 cause the cold air to flow off one side, and with sur- 

 prising" improvement to the room, considering- the 

 simplicity of the device. Forced circulation with a 

 complete system of distributing- air ducts is coming 

 into g-eneral use, as the meritsof this way of producing 

 circulation are better understood and appreciated. 



Query 2 was answered more generally, but that Answers to 

 some of the answers were mere guesses, or state- 

 ments made without testing, is very evident, as they 

 state that no difference was noticed in different parts 

 of the same room. With open piping or gravity air 

 circulation, this is an impossibility it is only possible 

 with a perfectly designed forced circulation system. 

 In contrast to this claim some answers state a differ- 

 ence in temperature of as high as 4 F. to 5 F., but 

 most answers show a difference of 1 F. to 2 F.; a 

 few ^ F. to 1 F.; and, still others, as before stated, 

 none at all. A marked variation of temperature in 

 different parts of a room, while in most cases caused 

 by defective circulation, is due sometimes partly to 

 location of room as to outside exposure, proximity to 

 freezing rooms, character of the insulating walls, etc. 

 An egg room placed over a low temperature freezing 

 room will show more variation between floor and 

 ceiling than when located over another egg room, 

 conditions being otherwise the same. Where this 

 arrangement occurs, and the egg rooms are operated 

 on a natural gravity air circulation system, eggs may 

 be frozen near the floor, when a thermometer hanging 

 at the height of a person's eyes would read 30 F. or 

 above. Even with the very best insulation, the result 

 of this very common arrangement is a defective cir- 

 culation and more or less variation in temperature 

 between floor and ceiling. 



