66 



MILK 



SPECIFIC GRAVITY OF MILK AND CREAM CORRESPONDING TO VARIOUS PERCENT- 

 AGES OF BUTTER.FAT AT 20° C. 



Per cent. Specific 



fat. gravity. 



14 1.019 



15 1.018 



h 1.017 



17 1.016 



18 1.015 



19 1.014 



20 1.013 



21 1.012 



22 1.011 



23 1.010 



24 1.009 



25 1.008 



26 . ..., 1.008 



27 1.007 



12 1.022 



13 1.020 



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: 



Temperature. 



EXPANSION OF MILK WITH TEMPERATURE 

 Volume. Temperature. 



31°F 1.00000 



35° F 1.00016 



40° F 1.00041 



45'F 1.00074 



50° F 1.00114 



55°F 1.00164 



Volume. 



60° F 1.00229 



65° F 1.00298 



70° F 1.00372 



75° F 1.00451 



86° F 1.00549 



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 OK 



VOLUME AT 20° C. 



Per cent. fat. 



0.025. 



1 



2 



4 



10. 

 12. 

 14. 

 16. 

 18. 

 20. 

 22. 

 24. 

 26. 

 28. 

 30. 

 32. 

 34. 

 36. 

 38. 

 40 



Temperature in degrees C. 



10 15 20 25 30 35 40 45 50 65 60 



9975 

 9975 

 9970 

 9970 

 9965 

 9955 

 9950 

 9950 

 9940 

 9930 

 9930 

 .9925 

 9925 

 .9915 

 .9915 

 .9910 

 .9910 

 .9900 



0.9990 

 0.9990 

 0.99S7 

 0.9985 

 0.9982 

 0.99S2 

 0.9982 

 0.9977 

 9977 

 0.9975 

 0.9975 

 0,9970 

 0.9970 

 0.9967 

 0.996S 

 0.9960 

 0.9960 

 0.9955 

 0.9955 

 0.9947 

 0.9947 

 0.9945 



1.000 

 1. 000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 

 1.000 



1.0010 

 1.0010 

 1.0O12 

 1.0012 

 .0017 

 1.0017 

 1.0022 . 

 1.0022^ 

 1.0022 

 1.0027 

 1.0027 

 1.0027 

 1.0032 

 1.0032 

 1.0035 . 

 1.0035!l 

 1.00401 

 1.004011 

 1.0045|l 

 1.0050,1 

 1.0050 1 

 1.005011 



0030 

 0030 

 0030 

 0030 

 0035 

 0036 

 0040 

 0040 

 0045 

 0050 

 0055 

 0055 

 0060 

 0065 

 0070 

 0075 

 0080 

 0085 

 0085 

 ,0090 

 ,0095 

 ,0100 



00471 

 00471 

 00471 

 00521 

 0057 

 0057 

 0062 

 0067 

 ,007.2 

 ,0077 

 0082 

 0087 

 ,0092 

 .0097 

 .0106 

 .0110 

 .0115 

 .0120 

 .01251 

 ,01301 

 .OlS.'i'l 

 .01C71 



0070 



0070 



0070 



0070 



0075 



0080 



0085 



0090 



,0095 



,0100 



,0105 



,0110 



.0120 



,0125 



.0135 



.0140 



.0145 



.01501 



.0160^1 



.0165 1 



,0170 

 0175 



.0092 1 

 .0092 1 

 .0092:1 

 .OO92I1 

 .0092,1 

 .010211 

 .OIO2I1 

 .011211 



.oin'i 



.0122 1 

 .0132,1 

 .01371 

 .0145,1 

 .0152 1 

 .0162 1 

 .0170 1 

 .0172 1 



.0182:1 

 .0187 1 

 .0197:1 

 .0206 1 

 .0212,1 

 I 



0120 



0120 



0120 



0120 



0125 



0125 



0130 



0135 



0140 



0145 



0155 



0160 



0170 



0180 



0190 



0200 



0200 



02101 



02151 



,022511 



,02301 



,02401 



0142 

 0142 

 0142 

 .0142 

 0142 

 0147 

 0152 

 0157 

 0162 

 0167 

 0177 

 0182: 

 0190 

 .0202 

 0212 

 .0222 

 .0222 

 .0232 

 .0242 

 .0247 

 .0252 

 .0267 



1.0175 

 1.0175 

 1.0175 

 1.0175 

 1.0175 

 1.0175 

 1.0180 

 I.OISO 

 1.0185 



0190 

 1.0195 

 1.0205 



.0210 

 1.0220 

 1 0235 

 1.0245 

 1.0250 

 1.0256 

 1.0260 

 1 .0270 

 1.0280 

 1.0290 



