306 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



so if necessary, while they may be left wide open at times when 

 the draft is not needed for the boiler. 



The success which may be attained with any ventilating 

 system depends largely on how much attention is given it by 

 the operator. 



Heat. 



The most economical heating system is provided by laying 

 pipes in the floor, and connecting these with the exhaust steam 

 pipe from the engine; thus, when the exhaust steam is not used 

 for heating skim milk or water, etc., it can be run through the 

 pipes in the floor and when the floor is once heated through it 

 will take but very little steam to keep it warm. The floor is 

 the ideal place for the heating system, because heat will always 

 rise while it is not so easy to get it down. 



It is not necessary to use new pipes in the floor as second 

 handed pipe will do just as well, and these can usually be bought 

 for from five to ten cents per foot. The pipes should be two 

 inches in diameter, and they can be laid on top of the gravel after 

 the foundation for the floor is in place. Instead of using the 

 ordinary elbows, the pipes can be connected with galvanized 

 iron elbows, commonly used for water spouts, by having the 

 elbow large enough so they can be slipped over the ends of the 

 pipes. This will provide for expansion and contraction of the 

 pipes; thus avoiding all clanger, from this source, of cracking 

 the floor. When the pipes are in place the floor can be laid right 

 over them; thus, the largest surface of the pipes will be embed- 

 ded in the floor slab, and as they are in the lower layer of the 

 floor, they can expand and contract without affecting the surface 

 of the floor. 



The weigh room should always be partitioned off from the 

 creamery, in order to keep the cold out in winter and the flies 

 in summer. To make it reasonably comfortable for the weigher 

 in winter, there should be a small radiator, or a few coils of 

 steam pipes placed in the weigh room, and the best place for 

 these is directly under the receiving door, as the heat will then 

 be in the place where it is most needed. 



