Butter-Fat Percentage in Jersey Cattle. 



155 



TABLE 4. 



Actual Butter-Fat Percentage of One Thousand Two Year Old 

 Cows and the Expected Five Lactation Butter-Fat Per- 

 centage for any Division of that Herd or per Cow 

 for Any Division of It. 





-W Pi 

 03 



<•> *-< os 





eg +^> to 



CJ0+ 3 



0> 



03 



ggos 



Bis a 

 <*>2 2 



g«« 



CO t_. 



03 g 

 03 co &0 



o*o3 

 03 S o 



f-l o — 

 a> i* 



a o 



5 « 



O+i 

 3 

 O SO 



a o3 

 o > a 



(S.I 



■9 o3 S 



£-g.w 



S ft 



OJ+J 



5o 3 



a) 

 u 03 



5- s 



> £ 



03 »0 



-a 03 



Q2 '*? "to 



£■£ ^ 



<a o3 -^ 

 2-S.Sf 



<JP4 



!?i'5o 



Hf^W 



££.0 



iz;.a.fi 



W.Q 1 



His 1 



3.75—3.86 



1 



4.281 



l 



1000 



4.28 



5.23 



3.85—3.95 



2 



4.346 



2 



999 



4.32 



5.23 



3.95—4.05 



3 



4.411 



5 



998 



4.37 



5.23 



4.05—4.15 



5 



4.476 



10 



995 



4.42 



5.23 



4.15—4.25 



7 



4.541 



17 



990 



4.47 



5.24 



4.25—4.35 



11 



4.605 



28 



983 



4.53 



5.24 



4.35—4.45 



17 



4.670 



45 



972 



4.58 



5.25 



4.45—4.55 



25 



4.735 



70 



955 



4.64 



5.26 



4.55—4.65 



34 



4.800 



104 



930 



4.69 



5.27 



4.65—4.75 



45 



4.865 



149 



896 



4.74 



5.29 



4.75—4.85 



56 



4.929 



205 



851 



4.79 



5.31 



4.85—4.95 



66 



4.994 



271 



795 



4.84 



5.34 



4.95—5.05 



75 



5.059 



345 



729 



4.89 



5.37 



5.05—5.15 



80 



5.124 



426 



655 



4.93 



5.41 



5.15—5.25 



82 



5.189 



508 



574 



4.97 



5.45 



5.25—5.35 



80 



5.253 



588 



492 



5.01 



5.49 



5.35—5.45 



75 



5.318 



664 



412 



5.05 



5.54 



5.45—5.55 



68 



5.383 



731 



336 



5.08 



5.59 



5.55—5.65 



59 



5.448 



790 



269 



5.11 



5.64 



5.65—5.75 



49 



5.513 



839 



210 



5.13 



5.69 



5.75—5.85 



40 



5.577 



880 



161 



5.15 



5.74 



5.85—5.95 



32 



5.642 



911 



120 



5.17 



.5.80 



5.95—6.05 



24 



5.707 



936 



89 



5.18 



5.86 



6.05—6.15 



18 



5.772 



954 



64 



5.19 



5.91 



6.15—6.25 



14 



5.837 



968 



46 



5.20 



5.97 



6.25—6.35 



10 



5.901 



978 



32 



5.21 



6.02 



6.35—6.45 



7 



5.966 



985 



22 



5.22 



6.08 



6.45—6.55 



5 



6.031 



990 



15 



5.22 



6.13 



6.55—6.65 



4 



6.096 



994 



10 



5.22 



6.18 



6.65—6.75 



S 



6.161 



996 



6 



5.22 



6.23 



6.75—6.85 



2 



6.225 



998 



4 



5.23 



6.27 



6.85—6.95 



1 



6.290 



999 



2 



5.23 



6.32 



6.95—7.05 



1 



6.355 



1000 



1 



5.23 



6.35 



The first column of the table gives the butter-fat test of the 

 milk produced in the first eight months of lactation for two- 

 year old cows. The second column gives the distribution of a 

 herd of one thousand two year old cows of like constitution to 

 the pure bred Jersey cattle which are being studied. All the 

 calculations have been carried to several decimal places beyond 

 the tabled constants as only by so doing would the results have 

 been more than approximately correct. The third column gives 



