216 Condensed Milk and Milk Powder 



determination 



The Beaume hydrometer is graduated to read correctly at 60 

 degrees F. (15.5 degrees C). For every degree Fahrenheit above 

 60 add .0313 points to the observed reading. For every degree 

 Fahrenheit below 60, deduct .0313 points from the observed reading. 



The specific gravity is determined by the use of the following 

 formula : 



145-5 



Specific gravity = = 



H5-5 — B 



B = Corrected Beaume reading 

 Example: Beaume reading at 80 degrees F. is 7.8 



Corrected reading = 7.8 + [(80 — 60) x .0313] = 8.43 



H5-5 

 Specific gravity = „ = 1.061c; 



145-5 — 8-43 

 Equally good results may be obtained by diluting the evapo- 

 rated milk with an equal wieight of water. Then take the Quevenne 

 lactometer reading at 60 degrees F. Multiply the reading by 2, 

 add 1000, and divide by 1000. 



Gravimetric Determination 

 Dilute the evaporated milk with four times its weight of water 

 and proceed as directed under "Milk," page 201. 



TOTAL SOLIDS 



By Means oe Specific Gravity and Babcock Formula 

 Determine the specific gravity as above directed. Multiply by 

 1000 and subtract 1000. Then use the following formula: 



L 



+ 1 . 2 x f 



4 



L = The figure derived from the specific gravity by above cal- 

 culations 



f = per cent, fat 



Example : Evaporated milk tests 7.8 per cent, fat and has a 

 specific gravity of 1.0615 



L = (1.0615 x 1000) — 1000 = 61.5 



61.5 

 Total solids = +1.2x7.8 = 24.74 per cent. 



