54 MARKET DAIRYING 
top and allow the milk to run down to the mark by slowly 
relieving the pressure of the finger. 
3. Empty the milk into the bottle in the manner shown 
in Fig. 16. 
4. Add the acid in the same manner in which the milk 
was emptied into the bottle. 
5. Mix the acid with the milk by giving the bottle a 
slow rotary motion. 
6. Allow mixture to stand a few minutes. 
7. Shake or mix again and then place the bottle in 
the tester. 
8. Run tester four minutes at the 
proper speed. 
") 
g. Add moderately hot water until ie 8 
contents come to the neck of the a 
bottle. ee 
10. Whirl one minute. = ‘ 
11. Add moderately hot water un- z2—(— _ 
til contents of the bottle reach about a ad 
the 8% mark. ae 
12. Whirl one minute. =, 
13. Read test. = 
oe 
How to Read Milk Test. At the = 
top of the fat column is usually quite a 4 =e o 
pronounced meniscus as shown in Fig, 3—=— 
17. A less pronounced one is found =o 
at the bottom of the column. The fat = 
should be read from the extremes of —o 
the fat column, I to 3, not from 2 to 4, 
when its temperature is about 140° F. Ot. 
a Fig. 17—Fat coiumn 
Too high a temperature gives too high  showingmeniscuses. 
