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BULLETIN 840, U. S. DEPARTMENT OE AGRICULTURE. 



fan, which will keep the air in circulation and produce better results 

 from the cooling coils. 



A considerable number of modern plants have an indirect 

 method of cooling the cold-storage room which also serves as a ven- 

 tilating system. The air is blown over bunkers or refrigerating coils 

 in another room and then through flues into the cold room. The 

 cold air drops as soon as it reaches the openings in this room and 

 the warmer air passes out through other openings and is again 

 drawn over the refrigerating coils, so that a constant circulation of 

 clean, dry, cold air is maintained. 



Fig. 14. — Milk-storage room with indirect system of cooling. Note flues through which 

 the cold air is fanned into the room, also system of conveying the milk into the 

 room from the bottling room. 



MISCELLANEOUS REQUIREMENTS. 



Screens should be attached to all windows and doors during the 

 fly season. The screens should be outside and open outward. The 

 receiving room especially should be well closed in and screened, and 

 self-closing doors should be attached to the room as well as to others 

 through which workmen pass continually. Electric fans will also 

 aid in keeping flies away from the milk and equipment. Double 

 doors at the entrance of the plant with fans blowing toward them 

 will greatly aid in keeping the flies out- 

 It is important to have a special room for the drivers and other 

 employees. In this room a locker for each man's working clothes is 

 essential, and shower baths and toilet facilities should be provided 

 in an adjoining room. 



