-d 



* In measuring the fat column in the 

 neck of a milk test bottle the reading 

 should be made from a to b, not to c or 

 tod. 



* In measuring the fat column in the 

 neck of a crearn test bottle the reading 

 should be made from a to c, not to b or 

 to d. The size of the meniscus is mag- 

 nified in this cut. 



In accordance with recent investigation it is considered more ac- 

 curate to measure the column of fat in a cream bottle from the bottom 

 of the meniscus (crescent) as indicated in the above cut. Such ob- 

 servations as we have made confirm this. The writer prefers to use 

 only the 6 inch 30 per cent. Connecticut cream bottles, taking one- 

 half the usual amount (9 grams), where the cream tests over 30 per 

 cent. The use of 9 inch cream test bottles having a smaller neck is 

 increasing on account of the greater accuracy obtained. 



For eliminating the upper meniscus in reading cream, the experi- 

 ment station has adopted a method advocated by the Indiana experi- 

 ment station, in which a small amount of white mineral oil (some- 

 times called glymol or glycolinef), colored red with alkanet root is 

 introduced into the neck of the bottle at the conclusion of the test 

 and just before reading. The white mineral oil, being of a lower 



* Reproduced from " Testing Milk and its Products," published by Mendota Book Co., 

 Madison, Wis. 



t Obtained of any wholesale drug house. 



