Condensed Milk and Miek Powder 211 



inches ; width of empty bulb, tbirteen-sixteenths of one inch. 



Hydrometer Jar. — Use a glass or tin cylinder with substantial 

 base, minimum length twelve inches, minimum wlidth one and a half 

 inches. 



DETERMINATION 



The Beaume hydrometer is graduated to read correctly at 60 

 degrees F. (15.5 degrees C). At this temperature the sweetened 

 condensed milk is too viscous for rapid and accurate work. Warm 

 the condensed milk to 100 degrees F. or above and correct the 

 Beaume reading by adding to the observed reading .025 points for 

 every degree Fahrenheit above 60. At a temperature of 100 degrees 

 F. or above, the reading can be made in fifteen minutes or less, after 

 the hydrometer is inserted in the milk. 



The specific gravity is determined by the use of the following 



formula : 



144.3 



Specific gravity = =7- 



144.3 -B 



B = Beaume reading at 60 degrees F. 

 Example: Observed Beaume reading at 120 is 31.6 



Corrected reading = 31.6 + [(120 - 60) x .025] = 33.1 



144.3 



Specific gravity = = 1.2977 



144.3 -33.1 



The following table shows the specific gravity of sweetened 

 condensed milk when the Beaume reading is known. 



