122 EVAPORATED MILK STRIKING 



throughout the year, the operator must watch the 

 behavior of his milk from day to day and from 

 season to season and he must modify the Beaume 

 reading in accordance with the changing conditions, 

 This is one of the all important stages of manufac- 

 ture, w'here relentless and careful study and watch- 

 fulness are indispensable. 



In order to make absolutedy sure that the den- 

 sity 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 stand- 

 ardizing vat, large enough to accommodate the 

 entire batch or several batches. The operator then 

 tests the milk again and this second estimation he 

 can perform more carefully, because he is then 

 relieved of the responsibility of attending to the 

 operation of the vacuum pan. If the evaporated 

 milk happens to be a trifle too heavy he can dilute 

 it with distilled water until the Beaume reading 

 is just right. See also "Standardization," Chapter 

 XXIX. For maximum uniformity and accuracy 

 of results of determination with the Beaume hydro- 

 meter, or by other means, it is essential that the per- 

 centage relation of fat to solids be uniform from 

 batch to batch. This uniformity requires standardi- 

 zation of each batch. 



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 

 rig 46 at *ke correc t temperature, i. e., 60 degrees F., and 



hydro- it is not convenient to cool the evaporated milk to 

 meter for 

 evaporated that temperature, the reading at any temperature 



Courtesy of mav be corrected as follows: when the tempera- 



C J Mt S C** Ue * ure at which the Beaume reading is taken is above 



