EGGS IN COLD STORAGE. 35 



tion over the pipes ceases. This should make plain 

 the fact that uniform temperatures in all parts of the 

 room are not even an approximate possibility in any 

 room depending- on natural gravity air circulation. It 

 may also be observed that the eg-g-s exposed to the 

 flow of cold air near bottom of coils will stand in a 

 dryer and colder atmosphere than those in top and 

 center of room. 



Fig-. 1 shows an outline sketch of piping- suspende 

 from the ceiling- of a room the most unscientific way 

 possible for a room to be piped, as it provides for no 



* " 



) ' f j*f 



v j ^ ^ J ; ( V j ^ s 



air circulation whatever. The only possible reason 

 why air will circulate over pipes in this position is be- 

 cause of the fact that the whole ceiling- is not covered 

 by pipes, which allows of a partial circulation, as 

 shown by the arrows. The volume of circulation in 

 the lower half of room is practically nothing-. It is 

 larg-ely confined to the top of room, the lower part 

 being- cooled by conduction and radiation almost en- 

 tirely. It may be asked : How can a room be cooled 

 by radiation? In the same way that a room is heated 

 by radiation, except that in cooling- a room the heat is 

 radiated_/>wft the objects in the room, and not to them, 

 as when heating-. This gives us ample reason why a 

 room should be cooled by circulating- the air over 



