I3O MODERN METHODS OF TESTING MILK 



obtain the percentage of salt in the original sample by 

 dividing the number of cubic centimeters of silver 

 nitrate solution used by 4. For example, if the bu- 

 rette reading shows that 10 cc. of the silver solution 

 are used, then 10 divided by 4 equals 2.50, which is 

 the percentage of salt in the sample of butter tested. 



WISCONSIN TEST FOR SALT IN BUTTER 



Sammis adapts the general method to creamery use 

 as follows: Dissolve 5.1 grams of pure silver nitrate 

 in pure water to make 250 cc. of solution. Each cubic 

 centimeter of this solution represents i per cent, of 

 salt when we use 17.6 cc. of the wash- water, which is 

 obtained by shaking 10 grams of butter with 250 cc. 

 of clean, warm water. The test is then carried out in 

 the manner described in connection with the preceding 

 tests. 



