68 EGGS IN COLD STORAGE. 



surface the room can be kept at its normal tempera- 

 ture. If pipes are badly loaded with frost, sometimes 

 no absorption of moisture will take place when the 

 refrigerant flowing' in the coils is 10 or 15 below the 

 temperature of the room. The surface exposed to 

 the air of the room, whether in the form of frost or 

 otherwise, must beat or below the temperature of the 

 dew point, or no moisture will be absorbed. The 

 value of suitable moisture absorbing- surfaces as the 

 cool weather of fall and winter approaches cannot be 

 overestimated, as many have found to their sorrow 

 that two weeks' stay in cold storag-e under bad condi- 

 tions in cold weather will do more harm to the eggs 

 than four months during- hot weather. 



The remedy for this trouble is found in keeping 

 the air of the room from coming- in contact with the 

 poisonous frost which has been accumulated on the 

 pipes during- their period of duty during- warm 

 weather; or what is still a better way is to not allow 

 the frost, to accumulate on the pipes at all, by using- a 

 device, described further on under head of absorb- 

 ents. How to keep the air from contact with the frost 

 on pipes is not an easy matter, and in case of piping- 

 suspended directly in the room it is an impossi- 

 bility. 

 Evaporation With a system of screens arranged around coils, 



from frost J 



accumulated on as described in the first part of the paper on circula- 



cooling- pipes. L 



tion, trap doors may be fitted to the opening's and the 

 air circulation shut off in this way; but the simplest 

 and best way is to equip the rooms with forced cir- 

 culation, and locate the pipes outside of the room en- 

 tirely. Then it is only a matter of shutting- off the 

 circulation over coils, allowing- it to continue throug-h 

 a by-pass, or if the device shortly to be described is 

 used, the circulation may be allowed to continue over 

 coils. It seems quite clear, from what has been writ- 

 ten, why a storage room gets foul quickly during cool 

 weather, and also that the bad conditions. may be bet- 



