66 



MILK 



SPECIFIC GRAVITY OF MILK AND CREAM CORRESPONDING TO VARIOUS PERCENT- 

 AGES OF BUTTER-FAT AT 20 C. 



Milk expands when the temperature rises, and this involves 

 a decrease of specific gravity. The expansion of milk of the 

 specific gravity 1.032 at 15 C. and 3.8 per cent, fat is given in the 

 following table taken from Richmond's Dairy Chemistry: 



EXPANSION OF MILK WITH TEMPERATURE 



Temperature. Volume. 



31 F 00000 



35 F 00016 



40 F 00041 



45" F OOC74 



50 F ' 00114 



55 F 1.00164 



Volume. 



Temperature. 



60 F ................... 1.00229 



65 F ................... 1.00298 



70 F ................... 1.00372 



75 F ................... 1.00451 



86 F... .. 1.00.549 



An extensive table of the coefficient of expansion on a basis of 

 20 C. has been compiled by Bowen, and follows in condensed 

 form: 



VOLUME OF MILK AND CREAM AT VARIOUS'TEMPERATURES OCCUPIED BY A UNIT 0F 



VOLUME. AT 20 C. 



Temperature in degrees C. 



