210 AGR1CUI.TURE OF MAINE. 



Perhaps the best form of cooler is the zigzag iplates with the 

 water running in a stream inside the plates, and the milk run- 

 ning on the outside. These coolers are small in area and are 

 therefore easy to wash. A round cooler is always a hard thing 

 to wash, but these zigzag coolers are small and easy to handle, 

 and contain no cracks or crevices to catch dirt. 



If a man chooses such a cooler I would strongly recommend 

 that he have an ice water tank below the level of this cooler, 

 with a little rotary water pump driven by an engine or motor. 

 The pump may be connected to the cooler by two pieces of 

 rubber hose, one leading from the ice water tank and the other 

 taking the ice water back to the tank, the water passing through 

 the cooler in the meantime. A cooler of this sort costs from 

 eight to twelve dollars, depending on the size and construction. 

 The pump costs about twelve dollars, and one of the thirty-five 

 dollar engines above mentioned will do for power. The ice 

 water passes rapidly through the cooler, and such a cooler will 

 cool milk down to 36 or 38 degrees, or in other words, almost 

 down to freezing. The ice water tank can then be used to set the 

 milk in over night. This is easily the simplest and handiest 

 fonn of cooler I know of, and the most economical on ice. 

 There is no preparation for cooling the milk necessary, except 

 to hang up the cooler and connect the rubber tubes and start the 

 motor. The supply of ice water is always on hand in the tank, 

 and no fresh water has to be cooled to ice temperature twice a 

 day, thereby wasting ice. 



The ice water tank serves the double purpose of being a 

 source of ice water to cool the milk, and also forming a tank to 

 put the milk into after it is cooled. This system, therefore, 

 uses no more ice than when the cans of warm milk are placed 

 in it immediately. 



In the construction of the ice water tank I recommend a 

 little extra care. The tank should be large enough to hold all 

 the cans, and preferably made of two inch pine plank, lined with 

 zinc. Outside the two inch plank I would put some tarred 

 paper, and outside of that matched boards. Any of the water- 

 proof felt papers would be much superior to simple tarred 

 paper. The cover and the backs should fit tight, and be made 

 of two layers of matched boards with felt or tarred paper be- 

 tween them, the lower layer of boards forming a shoulder to 



