Condensed Milk and Milk Powder 



85 



I 



Fig. 32. Beaume 



hydrometer for 



evaporated milk 



Courtesy of 



C. J. Tagliabue 



Mfg. Co. 



cordance with the changing conditions. This is one 

 of the all important stages of manufacture, where re- 

 lentless and careful study and watchfulness are indis- 

 pensable. 



In order to make absolutely sure that the density 

 of the evaporated milk is right, it is advisable to get it 

 just as near right as possible in the pan and then draw 

 the milk from the pan into a standardizing vat large 

 enough to accommodate the entire batch. The operator 

 then tests the milk again and this second estimation 

 he can perform more carefully, because he is then re- 

 lieved of the responsibility of attending to the opera- 

 tion of the vacuum pan. If the evaporated milk hap- 

 pens to be a trifle too heavy he can dilute it with dis- 

 tilled water until the Beaume reading is just right. 



Correction of Beaume Reading at Temperatures 

 Other than 60 Degrees F. — At a temperature of 120 

 degrees F. the Beaume reading of the finished batch 

 of standard evaporated milk may vary between 

 about 6 and 8 degrees B., according to season of year 

 and locality. At 60 degrees F. the Beaume reading is 

 approximately 1.88 degrees B. higher. 



If it is desired to record the Beaume reading at 

 the correct temperature, i. e., 60 degrees F., and it is 

 not convenient to cool the evaporated milk to that tem- 

 perature, the reading at any temperature may be cor- 

 rected as follows : when the temperature at which the 

 Beaume reading is taken is above 60 degrees F., mul- 

 tiply the difference between the temperature of the 

 observd reading and 60 by the factor .0313 and add the 

 product to the observed reading. 



Example: Beaume at 120 degrees F. is 6.8; what 

 is the reading at 60 degrees F. ? 



Answer : 6.8 + (60 x .0313) = 8.68 degrees B. 



The corrected Beaume reading is 8.68 degrees B. 

 When the temperature at which the reading is made 

 is below 60 degrees F., multiply the difference be- 



