a2 BULLETIN 849, U. 8S. DEPARTMENT OF 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. 
Fic. 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. 
Sereens 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, 
