34 MILE-ANALYSIS. 



much as 100 c. c. of London water contains only 0.03 gram- 

 mes of mineral matter, whilst 100 c. c. of milk contains 0.73 

 grammes of mineral matter. Watering will, therefore, be 

 indicated by diminished ash ; and in cases of watering, it is 

 worth while to make a careful determiaation of ash as a 

 sort of confirmatory test. 



