THE DAIRY HOUSE 133 



needed. Next apply one and one-half inches of cement 

 plaster consisting of one part cement, three parts clean, 

 coarse sand, and one part slacked lime paste. Press the 

 concrete partly through the wire lathing. Finish with one 

 part cement and one part sand and trowel off as smoothly 

 as possible. This construction provides one three-fourths 

 inch and one four-inch dead air spaces. 



The appearance of a wall thus constructed is much im- 

 proved by coating it with a cement filler which gives it a 

 uniform grayish color. If this is followed by two coats 

 of white enamel laboratory paint, the walls present a very 

 sanitary appearance. 



The author has thoroughly tested this enamel paint 

 and has found it very satisfactory. The walls of the milk 

 room especially should be painted with the enamel to 

 within two or three feet of the floor. 



Construct a four-inch concrete floor upon a well tamped 

 foundation consisting of gravel, cobble stones and cijiders. 

 These materials afford good drainage and thus prevent the 

 cold and dampness usually associated with concrete floors. 

 In preparing the concrete for the floor use one part 

 cement, two parts clean, coarse sand and four parts 

 gravel or crushed stone. Finish with one part cement and 

 two 'parts sand. 



All parts of the floor should slope toward the drain in 

 the center. Round out the corners and edges of the floor 

 with concrete to make them more easily cleanable. 



To provide insulation for the concrete floor of the re- 

 frigerator, asbestos or other insulating material is used 

 as shown in Fig. 23. The asbestos must be protected from 

 moisture by covering both sides with waterproof paper. 



The ceiling should be about twelve feet high and built 

 of the best ceiling lumber. Keep the ceiling well painted. 



