334 Milk and Its Products 



may be less warmly built, still it is not sufficient 

 that the superstructure be merely of siding nailed 

 to the joists, leaving the inside bare. While, per- 

 haps, it is not necessary that the outer siding be 

 double, or that building paper be used upon the 

 joists, still the joists should always be ceiled upon 

 the inside and the ceiling neatly finished in oil. 

 The construction of the curing room is the most 

 important part of the cheese factory. Here the 

 construction should be of such a nature that a 

 fairly constant temperature may be maintained. This 

 can hardly be secured unless the building is covered 

 on the outside with two thicknesses of boards, with 

 paper between and tightly ceiled upon the inside. 

 This part of the factory, at least, should always be 

 upon a solid wall foundation. Constructed in this 

 way, if care is taken to ventilate the building thor- 

 oughly at night, and to close it tight during the 

 day time, a fairly cool curing room can be secured 

 even during the hottest weather ; but the temperature 

 can be much more satisfactorily regulated if the ven- 

 tilation comes through a sub -earth duct for a con- 

 siderable distance. This may be arranged by laying 

 a three or four -inch glazed sewer pipe at least four 

 feet deep, from a point on the surface fifteen or 

 twenty rods from the building, and opening into 

 the center of the curing room through the floor. 

 If the mouth of this sub-earth duct can be placed 

 in such a position that the prevailing winds will 

 blow toward it, a circulation of cool air can more 

 easily and certainly be secured. 



