304 



MODICRN BUTTER MAKING. 



reading from a to c or from e to d (and allowing for 

 the meniscus) due to difficulty in locating .these 

 places on the graduation. The curvature of the bot- 

 tom of the column in cream tests is rounded enough 

 to allow for the .2 per cent left in the test bottle. 

 Therefore all subtracting should be done from the 

 top — the space occupied by the meniscus. 



82. Comparing a 50 per cent, 6 inch, 18 gram cream 

 test bottle with a 30 per cent (Pig. II.) a 50 per cent 

 (Pig. III.), and a 55 per cent (Pig. IV.) bottle. 



C-Tf 



B-iiii«-^ 



Fig. V shows a 50 per cent cream bottle graduated 

 into 1 per cent. There are 16.3 per cent per inch in 

 the graduation. The graduated part of neck is 

 about 3 1/16 inch long. The diameter of the inside 

 of neck is i/2 inch. This is too. wide for correct 

 reading, because the bottom of the fat column is not 

 always even. Sometimes the bottom of the fat col- 

 umn curves upward, or is slightly hollow (e), or ir- 

 regular. Due to these unavoidable irregularities 

 this bottle should be used in the following manner 

 if it must be used : Read from the extreme bottom 



