EGGS IN COLD STORAGE. 59 



No doubt the high speeds necessary for some work 

 have obliged the manufacturers to make their fans 

 amply strong- for the highest speeds, consequently 

 they are not economical for the slower speeds. It 

 would not be appropriate for a person to fan himself 

 with a dinner plate it would do the work, but would 

 not be economical of power. 



So far we have found out what kind of ventilation 

 is not desirable, and have an inkling- of what kind 

 would be desirable. The question before us now is to 

 properly treat the air before introducing- it into the 

 storag-e room, so that it may be fresh /. <?., pure 

 oxyg-en and nitrog-en, without excessive moisture, 

 and free from the impurities and germs which may 

 contaminate the product which is being- refrig-erated. 



The questions referring- to temperature contained Questions 

 in the letter of inquiry sent out by the writer before ventilation. 

 beg-inning- to write these articles are as follows : 



First. What plan do you pursue in ventilating 

 egg rooms? 



Second. Under what circumstances and how often 

 do you ventilate? 



Third. How often do you consider it advisable to 

 make a complete change of air? 



Outside of a bare dozen, the replies on this much- Miscellaneous 



replies to ven- 



talked-of subject were of no value whatever for our tiiation queries 

 purpose. Most of those answering- do not ventilate ; 

 many others get their ventilation through the opening 

 of doors; some ventilate through an elevator shaft, by 

 opening doors at top and bottom, etc. Only three or 

 four are properly cooling and drying the air before in- 

 troducing it into the egg rooms. One successful stor- 

 age manager says that. "It is trouble enough to take 

 microbes, bacteria, moisture, etc., out of one batch of 

 air" (meaning the air in his rooms at the beginning 

 of the season), without adding to his troubles by send- 

 ing in more air loaded down with the same mischief 

 makers. As before pointed out, unless the air to be 



