106 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



develops very slowly, the bacteria which causes souring. At 90 

 degrees it grows very rapidly, increasing the acid and causing 

 the milk or cream to spoil. Some concerns have manufactured 

 special coolers for keeping the cream or milk on the farm, tak- 

 ing better care of it, and the company by whom I am employed 

 manufactured, for experimental purposes only, a number of 

 coolers which have been tried out in North Dakota, South Da- 

 kota, Minnesota and Oklahoma. We make these coolers for the 

 purpose of showing the farmer that he can produce a bette^ 

 quality of cream on his farm under the conditions under which 

 that cream is produced. These coolers are made of heavy gal- 

 vanized iron, with two layers of cork insulation. They are made 

 so that they will hold a ten-gallon can, or a five-gallon or smal-- 

 ler can, like the can used on the farm. They also have two-' 

 gallon cans used to separate the warm cream into, and this two- 

 gallon can was placed into the water by itself and allowed to 

 cool before the next separation, thus preventing the mixing of 

 warm cream with cold cream. You could write bulletins on the 

 care of cream on the farm and give lectures on the care of 

 cream on the farm, but when you have a cooler placed out on 

 the farmer's farm and you can prove to him, and he in fact wilJ 

 produce a better qaulity of cream, you have a demonstration there 

 that is going to cause all the farmers to consider the control of 

 temperature. These coolers in these western states during the 

 last summer gave good satisfaction. We were able to produce 

 sweet cream three days old. Of course we are not advocating 

 the keeping of cream three days on the farm. We are advocat- 

 ing frequent delivery, delivery every day, but it goes to show 

 that the farmer who has a receptacle for taking proper care of 

 his cream and controlling the temperature on the farm, will be 

 able to get first grade cream to the market he is selling his cream 

 to. There are a number of coolers on the market. For instance, 

 during the past fall a concern in Minnesota is manufacturing a 

 cooler that can be used on the farm for milk and cream that wiU 

 take care of the product of ten cows. These coolers are being 

 experimented with. Wq are not manufacturing them, but are 

 using them for demonstration only. ^Vhen these coolers are 



