218 Report of tue Curmical Dj-partmi£nt of the 



zontally until it comos under the curing-room which it enters 

 directly, as shown at B B I> C. The top of the well is tightly 

 closed. ' 



In Plate XII the cut illustrates the cooling of air in a curing- 

 room by forcing the air through cold water. When the ground 

 water is within 12 or 15 feet of the surface, then a cistern 5 or 6 

 feet in diameter, shaped like a well, may be built, plastering with 

 cement as in the case of ordinary cisterns. In this cistern can 

 be placed an air duct made of galvanized iron as given in Plate 

 XII. The duct should be water-tight. By connecting the 

 cistern with the well, fresh water may be added from time to 

 time as may be found necessary to keep water sufficiently cool 

 to be effective. 



In Canada, considerable work has been done in using ice in 

 curing rooms to control temperature. Where ice can be 

 obtained conveniently and cheaply, this method may be advant- 

 ageously utilized. One or more ice boxes are placed in the 

 curing-room, so built that air can circulate about the ice and 

 into the curing-room. Also compartments, filled with ice, may 

 be made adjoining the curing-room on the side or above, pro- 

 vided with openings into the curing-room which will allow a flow 

 of air over the ice and into the curing-room. 



Where special means are needed to secure moisture, this can 

 be effectively done by means of yard-wide strips of any cloth 

 material that has good capillary power. The pieces of cloth 

 are hung about the room and kept more or less saturated with 

 water. Experience will tell how much evaporating surface is 

 needed to provide the degree of moisture needed. 



