March, 1928] Electric Dairy Cold Storage 5 



regular interior surface. The efficiency of the insulation is, therefore, 

 variable with different sections of the walls. To further conserve the in- 

 side space, corkboard was fitted in between the floor beams on the under 

 side of the double-boarded floor. This cork is exposed to the outside 

 air. • The wooden side-walls and ceiling contain two air spaces. Cork- 

 board was applied to the underside of the ceiling without lining or finish. 

 The rack which formerly held the ice was used to support the brine 

 tank located in the back of the room opposite the door (See Fig. 1). 

 There is a 3% ft. clear height between the rack and the floor. 



Farm No. 4. In this case the room is in the ell connecting the house 

 and barn, where it is well protected from any direct heat. The dis- 

 tance from the kitchen is slightly more than in the case of the average 

 household refrigerator but not so far as many cellar cold rooms. It 

 is some distance away from the cow stable, as it should be, and centrally 

 located as regards precooling, bottling and the washroom where the 

 utensils are cleaned. The delivery truck is handily loaded almost from 

 the door of the cold room. 



The old cooling room was entirely dismantled and a new room built 

 in the same location according to standard refrigerator specifications, 

 thus furnishing a fairly accurate cost figure for new construction. Two 

 standing walls, the ceiling and floor of the old room, were utilized. For 

 the benefit of any who may wish to construct similar rooms the details 

 of construction will be given in some detail in a later bulletin. Due to 

 its use for both dairy and house products the room is somewhat larger 

 than the other cold rooms. The brine tank is located on the upper 

 right side of the doorway as shown in Fig. 2 (Cover page). 



Farm No. 1. The cold storage on this fann is located in the basement 

 of the ell of the house adjoining a dairy room where bottles and utensils 

 are washed and the milk is precooled and bottled. In addition to the 

 brick wall in front and the stone foundation on the side, a three parti- 

 tion wall having two air spaces filled with paper was constructed on all 

 four sides and the ceiling. The floor consisted of bricks laid in sand 

 and then covered with concrete. 



The walls w^ere insulated w^ith paper, followed by 3 inch corkboard 

 with asphalted joints, after which the surface was finished with a cement 

 coating and painted. Three inch cork was used in this case because the 

 two air spaces in the walls were paper-filled, and because the room was 

 located in a naturally cool basement. The concrete floor was left 

 uninsulated for the first and second years' operation. The door contains 

 two air spaces and is also insulated, but being of the wedging type vnth- 

 out edge overlaps, is not strictly tight at the closing joints, especially 

 at the bottom. The tank is located at the left of the door and is 

 mounted on a rack similar to that built on Farm No. 4. The propor- 

 tions of this room make it a compact but comfortable space to work 

 in, though a height of 6i/4 ft. would give better headroom. 



The door opens directly into the dairy room, which is quite steamy 

 and warm every morning; and this moisture-laden atmosphere, added 

 to the natural moisture-drawing qualities of the cement floor, causes 

 quick and heavy coating of frost on the brine tank, making it neces- 

 sary to defrost as often as every two weeks. This action has had its 

 effect on the efficiency and current consumption of the equipment. 



