EGGS IN COLD STORAGE. 69 



tered by cold weather ventilation. The harm result- 

 ing- from the foul evaporation from frost on cooling- 

 pipes may be obviated by not allowing- contact between 

 it and the air of room, but the evaporation from the 

 eg-g-s themselves must be taken up by other means 

 when cooling- surfaces are no long-er operative. 



By carefully observing- conditions a storag-e room 

 mav nearly always be kept in prime condition during- ventilation, 

 cold weather by no other means than the introduction 

 of fresh outside air at as frequent intervals as rig-ht 

 conditions of temperature and humidity will permit. 

 It is quite safe to force in plenty of air which has 

 about the same temperature and humidity as the 

 room to be ventilated. There are few impurities in 

 the clear, crisp air of a brig-ht fall day, and many such 

 are available for our purpose in the latitude of Min- 

 nesota and New York, and a somewhat smaller num- 

 ber, perhaps, in the latitude of Iowa or Ohio. It is only 

 a matter of handling- the free air of heaven under- 

 standing-ly. One's impressions, however, will hardly 

 do in judging- what air is g-ood to use for ventilating- 

 purposes. If you have a brig-lit, clear day, or, what is 

 still better, a clear, cold nig-ht, which has the appear- 

 ance of being- what you want, g-et out your sling- 

 psychrometer and set all g-uesswork aside. It is 

 frequently possible to fill your eg-g- rooms with fine, 

 pure air at a temperature about the same as that of 

 the room, as early as the latter part of October, if 

 you are watching 1 for the-opportunity. Provide a g-ood 

 big" fan wheel, which will handle a larg-e volume of air 

 in a short time, and when conditions are rig-ht blow 

 your rooms full of it. Repeat this whenever the 

 weather conditions will permit. 



We may now consider cold weather ventilation 

 under another condition, viz.: When it is colder out- weather - 

 side than inside the storage room. Whenever the out- 

 side air is 8 C or 10 below that of the storag-e room it 

 is always perfectly safe to introduce it into the stor- 



