83 



chine seems to me to be advisable, but we must be prepared to 

 spend at least $1,000 on it, as a too small machine is a delusion 

 and a snare. We should have a brine tank in the cold storage 

 room to hold the temperature during the night. There are 

 various systems in the market, but for creamery use it seems 

 the direct expansion ammonia system is the best, providing the 

 coiling is done by experts so that there shall be no leakage. 

 Liquid air has not yet been made practicable. 



REFRIGERATORS. 



Small double boxes may be constructed on the farm with 

 from 2 to 4 inches thickness of felting or 6 inches sawdust, 

 and will do nicely, though refrigerators can now be bought at 

 reasonable prices. 



Refrigerating rooms, like good ice houses, may be built 

 either way, but, as a rule, the air space system is the simpler 

 and is effective enough if there are at least five air spaces, and 

 if all circulation of air from wall to ceiling and floor and from 

 wall to wall is effectually stopped. Careless builders often make 

 the partition a delusion and a snare by knocking holes in the 

 paper when putting it up. The studs are placed at a distance 

 that will allow the paper to lap over an inch or so and a I 

 inch thick strip is then nailed firmly over the seam on the studs, 

 the next paper put on, and so on until from 5 to 7 air spaces 

 are built up. The inner and outer walls are made of matched 

 boarding. The paper should be close and air-tight and should 

 not swell. Prof. King recommends the 3-ply giant paper made 

 by the Standard Paper Company, this is acid proof. The wood 

 used should not have a strong smell, like pine. 



The biggest danger is at the joining of walls, ceiling and 

 floor. It is safest to fill the lower six inches of the air spaces 

 with mineral wool, as it must be remembered that a leakage of air 

 at the bottom is far more detrimental than at the top. The floor 

 should be insulated as carefully as the sides and should be 

 water tight. 



The door is a difficult problem and requires a good carpenter 

 to construct it so as to fit tight ancj yet not swell and stick too 

 hard. It is always better to have a sort of entry room, or at least 

 two doors so far apart that one may be shut before the other 

 opens. Good doors with frames may be bought ready made. 



It will be seen that even a refrigerator may be constructed 



