THE EARTH'S BOUNTY 



forces. The fat globules are so small that 

 one drop contains many millions of them. It 

 is said that if a person should attempt to 

 count the globules in a drop of milk, it would 

 take ten years of his time, provided he counted 

 at the rate of 100 per minute, and worked ten 

 hours per day, six days every week. Such a 

 number is too large to be appreciated. The 

 globules average about one ten-thousandth 

 of an inch in diameter, and twenty-five of the 

 average size, placed side by side, would about 

 represent the thickness of ordinary writing 

 paper. Globules of different sizes are found 

 in the milk of any cow, but, with certain 

 breeds, the sizes average larger than with other 

 breeds. The milk of Jersey and Guernsey 

 cows has this peculiarity, which explains why 

 the cream rises so readily on it large glob- 

 ules naturally being able to get to the top 

 more quickly than small ones, many of which 

 cannot rise at all. 



One hundred pounds of average milk con- 

 tains about the following amounts of the dif- 



178 



