q6 THE HOUSE AND ITS EQUIPMENT. 



This plant, therefore, illustrates three separate methods of applying the cold produced by the 

 machine besides ice-making. The plan also gives a good idea of the insulation which is required. This 

 is a most important point in connection with cold-storage plants. The object of the insulation is to 

 prevent any outside heat from passing into the chamber. If this were not done, it would be necessary 

 for the machine to remove not only the heat from the goods placed in the chamber, but also the heat 

 passing through the walls. Several materials can be used for this purpose, those most commonly used 

 being silicate cotton, cork, charcoal and sawdust. When insulating a room already in existence, if the 

 walls are dry the material to be used can be placed against them. The method of construction in this case 

 would be to place wooden battens six inches to eight inches broad against walls, floor and ceiling, and 

 nail boarding to these, the six-inch space between the boarding and the walls being filled in with insulating 

 material. If it is wished to give a very good finish, the boarding can then be covered with white tiles, 

 which give an extremely clean and fresh appearance to the chamber. Insulation such as described can 

 always be carried out by a local carpenter at a very small cost. 



For use in connection with the storage of game, the plant would be similar to the one already 

 described, except that the chamber would probably be considerably larger. The best cooling appliances 

 to use in this case would be brine drums on the ceiling worked in conjunction with an air cooler. When 

 the chamber was filled up with fresh game, the air cooler would be used to reduce the temperature and to 

 freeze the contents of the chamber ; the brine drums would then be used for maintaining the temperature 

 which had been reached. It must be borne in mind that the more perfect the insulation of the chamber 

 is made, the less work has to be done by the refrigerating machine. 



Dairy-work, as before noted, is rather a subject by itself. The cold store to be used in connection 

 with a dairy is constructed on the same lines as the dairy-room shown in Fig. 125. Besides this there would 

 be the cooling of the milk, which is carried out by passing it in a thin film over a special milk cooler. Coils 

 of piping, through which brine is circulated, are also sometimes placed in railway churns containing the 

 milk, so that the temperature may be rapidly reduced. DUDLEY G. GORDON . 



