620 FAT-CONTENT AND ELECTRICAL CONDUCTIVITY OF MILK, 



Table iv. 

 ]Vci;/hfs of fat and of tolal solid matter remored from 100 c.c. of milk 

 hy spmnhuj in a cenlrifiifje. 



The above figures show that a certain amount of material 

 other than fat is removed from milk by spinning. Tliis is the 

 material adsorbed by, and adherent to, the fat-globules, and as 

 would be expected from the rather indefinite nature of its asso- 

 ciation witli the fat, its amount is rather variable, ranging from 

 12% to 1% of the weight of fat removed. If this material be 

 assumed to have the average density of the solids other than fat 

 of milk, 1-6, then the volume occupied by it will be only 0-6 to 

 7% of the total volume removed. This increase of volume is 

 quite insufficient to account for the excess of the efibct of the 

 fat on the conductivity over the volume-effect (30-120%). 



3. Effect of degree of siihdivision of fat.— ^t was thought that 

 some light might be thrown on the variable effect of fat on the 



