302 MAINK AGRICUIvTUEAL JiXPKRIMENT STATION. I913. 



TABLE 1. 

 VARIATION CONSTANTS FOR FAT PERCENTAGE. 



Month. 



Milking. 



Mean. 



Standard 

 deviation. 



Coefficient of 

 variation 



March 



Morning 



Midday 



Evening 



2.717±.018 

 3.210=t.020 

 2.922±.015 



0.149 ±.013 

 .166±.014 

 .125±.011 



5.487±.479 

 5.156±.450 

 4.295±.374 





Total day 



2.916^.015 



.126±.011 



4.311±.376 









May.. 



Morning 



2.772=1^.017 

 3.215±.017 

 3.318±.03S 



3.352=t.030 



0.136±.012 

 .138±.012 

 .305 ±.027 



.246±.021 



4.899±.427 

 4.292±.374 





Evening (as given) 



Evening (partially correct- 

 ed) 



9.195±.808 

 7.354±.644 





Total day 



3.031±.013 



.103 ±.009 



3.408±.297 









July 





3.092=b.021 

 3.162=t.017 

 3.448=t.024 



0.168±.015 

 .135±.012 

 .197±.017 



5.415±.473 





Midday 



Evening 



4.257±.371 

 5.722±.500 





Total day 



3.196±.013 



.104 ±.009 



3.238±.282 









October. . . . 



Morning 



Midday 



Evening 



3, 305 ±.023 

 3.570±.019 

 3.572±.021 



0.184±.016 

 .156±.014 

 .168±.015 



5.573±.487 

 4.364±.381 

 4.695±.410 





Total day 



3 445±.016 



.131±.011 



3.797±.331 













TABLE 2. 

 VARIATION CONSTANTS FOR AMOUNT OF FAT. 



Month. 



March . 



May. 



July. 



October . 



Milking. 



Morning. 

 Midday . 

 Evening . 



Total day . 



Morning. 

 Midday . 

 Evening. 



Total day. 



Morning. 

 Midday . 

 Evening. 



Total day . 



Morning. 

 Midday . 

 Evening. 



Mean. 



Standard 

 Deviation. 



I Coefficient of 

 I variation. 



6.205± 

 5.634± 

 3.910± 



.069 

 .108 

 .092 



15.691± 



210 



8.159± 

 6..592± 

 4.810± 



.089 

 109 



084 



19. 494 ± 



247 



7.904± 

 6.276± 

 5.034± 



098 

 073 

 070 



19. 283 ± 



217 



8.286± 

 5.9o8± 

 4.658± 



071 

 079 

 092 



0.560± 



.876± 

 .745± 



.049 

 .076 

 065 



1.701± 



148 



0.723± 



.883± 

 .680± 



.063 

 077 

 059 



2.005± 



175 



0.797± 

 .59o± 



.568± 



069 

 .052 

 049 



1.761± 



153 



Total day 1S.939±.197 



. 579 ± . 050 

 .644 ±.056 

 .749 ±.065 



1.602±.139 



9.019±.792 

 15. 548 ±1.387 

 19.059±1.719 



10. 843 ±.995 



8.859±.778 

 13.395±1.187 

 14. 139 ±1.256 



10. 287 ±.905 



10.082±.887 



9. 481 ±833 



11.279±.995 



9.132±.802 



6.990±.612 



10.811±.953 



16.080±1 .436 



8.458±.742 



iFrom these tables the following points clearly appear: 

 I. In general the percentage content of fat is lowest in the 

 morning milk. The fat percentage is higher in the other two 



