54 EGGS IN COLD STORAGE. 



It is hardly necessary to do this (although it has 

 been done in case of some old time houses), as a 

 practically tight job may be had by using- the right 

 materials, well put on. Air leakage may not be ex- 

 actly ventilation, but it is a kind of ventilation which 

 has given the writer some trouble in the past, and 

 does still, consequently the difficulties of operating 

 a house with defective insulation and large outside 

 exposure, and still turn out first-class eggs, are very 

 thoroughly appreciated. 



4Jn f m r uIt e be la ' Methods of ventilation which are permissible 

 when applied to the work of supplying fresh air to 

 ordinary structures are generally dangerous when 

 used to ventilate cold storage rooms. The problem 

 in ventilating non-insulated structures is merely the 

 supplying of fresh air from the outside without caus- 

 ing a marked change in the temperature, and without 

 creating strong drafts. Air for the ventilation of 

 refrigerator rooms, during warm weather, must be 

 of very nearly the same temperature and relative 

 humidity as the air of the room to be ventilated, and 

 free from the germs which hasten decay and cause a 

 growth of fungus on the products in storage. If a 

 door or window of a storage room is opened directly 

 to the outside atmosphere, there will be little or no 

 circulation of air into and out of the room when the 

 temperature outside and in is about the same, unless 

 the wind should be favorable. As we cannot ventilate 

 in this way when the air outside is colder than the 

 storage room, on account of freezing the eggs, and the 

 introduction of fresh air, which is warmer than the 

 storage room, is not permissible, for reasons already 

 given, the matter reduces itself to not ventilating at 

 all during warm weather (which most houses prac- 

 tice), or of properly cooling and purifying the air be- 

 fore forcing it into the storage room. It will bear 

 repeating that it is positively bad practice to allow air 

 from the outside to get into an egg room during the 



