116 PROFITABLE DAIRYING 



which, is not quite so accurate, is as follows: 

 Find out how much the milk from the herd tests 

 by testing at intervals for a few days. There 

 naturally will be some variation, but a test of 

 the milk every few days will give the dairyman 

 a fair average. It will then only be necessary 

 to weigh the milk and cream. We will assume 

 that a milkman made a contract to deliver 18 

 per cent cream to an ice cream factory, that he 

 had 280 pounds of milk and that it tested approx- 

 imately 4.20 per cent. Multiplying 280 by 4.20 

 will give 11.7 pounds of fat; dividing the 11.7 

 by the test of the cream, 18, we get 65, or the 

 number of pounds of cream testing 18 per cent 

 which we should have that day. All that it is 

 necessary for him to do now is to weigh the 

 cream and add enough skim-milk to bring the 

 weight up to 65 pounds. While this method is 

 not quite so accurate, it is in most cases fairly 

 satisfactory. 



EXERCISES 



1. What is the most profitable way of disposing 

 of the milk in your vicinity ? 



2. What returns do you get per cow per year ? 



3. What is the cost of keeping a cow in your 

 vicinity ? 



4. What is the weight of a gallon of milk? Of 

 20 per cent cream? 



5. How many gallons of 20 per cent cream will 

 you get from 100 pounds of 4 per cent milk? 



