622 FAT-CONTENT AND ELECTRICAL CONDUCTIVITY OF MILK, 



very close to that of the glass used. The measurements were 

 checked by weighing the amount of mercury contained in a 

 known length of the tube. The accompanying figures show that 

 the optical measurenients of diameter agree well with those 

 calculated froni the weij^hts. 



These figures show that the results obtained by the two 

 methods are concordant to within their limits of error. 



In the following Table are shown the ratios of percentage of 

 fat to the percentage-decrease of conductivity, and the numbers 

 of fat-globules in 1 cu.mm for different samples of cows' milk. 



Table v. 

 De;/ree of subdivision of milk-fat and its effect on the electrical conductivity. 



As will be seen from the above figures, no simple relation ap- 



