12 



UNIV. OF N. H. AGR. EXPERIMENT STATION [Bulletin 250 



of milk including storage for one day. Subsequent storage in 40-quart 

 cans in a wet tank having 2-incli cork insulation was accomplished at an 

 average expenditure of 2.2 kwhs. a day during a period between October 

 and June for 100 quarts of milk. 



In three dry-storage rooms on experimental farms in the state, costs of 

 coohng 100 quarts of milk were 1.35 kwhs., 2.07 kwhs., and 2.65 kwhs., 

 the average being 2.02 kwhs., slightly less than for the wet-tank method. 

 The dry storage having the highest power demand for cooling, however, is 

 of apparent faulty construction, and, if eliminated from the averages, the 



Figure 3. — A corner of a milk room showing one of the types of pre-coolers being used on 



experimental farms. 



cost of cooling by the dry storage method is found to require .8 kwh. a 

 day less for cooling 100 quarts of milk. 



Pre-cooling by circulating well water with a motor-driven pump on one 

 experimental farm was accomplished at a cost of .8 kwh. of electricity for 

 100 quarts of milk a day. This cost is one-third less than was obtained in 

 later tests at the station and indicates that size of motor and pump, tem- 

 perature of water, rate of circulation of water, rate of flow of milk, etc., 

 affect the costs and prevent conclusions being made. Further tests are 

 underway. {Purnell Fund.) 



