APPLICATION OF EEFBIGEBATION TO HANDLING OF MILK. 5 



Freshly drawn milk shows a smaller viscosity than it does after 

 being allowed to stand for some time. It is a well-known fact that 

 the viscosity plays an important part in the formation of cream and 

 in the skimming of milk. 



COEFFICIENT OF EXPANSION OF MILK AND CREAM. 



In Table II is given the change in the volume of milk and cream 

 with varying percentages of fat and degrees of temperature. The 























































uo 







































































































1.05 















/ 



\ 















































/ 









































IflC 













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-®- 



S 





1% 



■Ml 



LH 













J&r 





$o 





J&- 

















































P 



\y 



/ 





















\ 





-■■=<. 



>% 



CF 



>EA 



M 















(s 





I 

























r 































i 











* 





I 

























\ 

























ao 





























v 

























4* 































X 



•4K 



>T° 



Gfr 



>EA 



.1-7 

























































































































































































































65 









































































































66 





















































aa is. && <?2 ios us. izs /32 



TEMPCfi ATU/?£-- OSG.ff£:£S FA\HREtiH£IT. 



i«a isa 



Fig. 1. 



-Curves showing the specific heat of milk, 20 per cent and 40 per cent cream at different tem- 

 peratures. 



percentage of fat varies in steps of 1 per cent from skimmed milk to 

 double cream, and determination of change in volume has been made 

 in steps of 2° F. from 50 to 140° F. A temperature of 68° F. (20° C.) 

 has been taken as the basis and the change in volume reckoned from 

 this temperature. These tentative determinations and those on spe- 

 cific gravity were made by the Division of Weights and Measures of 

 the United States Bureau of Standards. 



