43^ Circular Xo. 3. 



4 Great care is necessary in detecting the first change in color. This 

 is made easier by holding the fluid being tested over the large volume 

 from which the sample has been taken. 



5. Temperature of the milk, whey, etc., has no influence on the result 

 of the test. 



6. Always be accurate in measuring with the pipette, and clean it 

 each time after using. 



7. Use all your tests and special senses. The acidimeter is the best 

 acid measure we have, and if carefully used is most reliable; but errors 

 Vv'ill result from carelessness and inability of the user. 



