Dairy  Cattle  and  the  Butter  Test. 
43 
abnormally  good  or  bad,  but  taking  the  trials  as  a whole  the 
figures  given  above  will,  I believe,  be  found  as  nearly  accurate 
as  possible.  The  practical  good  derived  from  a knowledge  of 
the  butter  ratio  figures  is  that,  given  the  price  of  milk,  the 
cost  of  making  butter  from  that  milk  can  be  readily  arrived  at. 
An  example  will  make  this  clear.  If  the  price  of  milk  is 
estimated  at  %d.  per  gallon,  the  butter  made  from  the  milks  of 
Fig.  5.— Longhorn.  Milk  x 500  diam. 
the  various  breeds,  eliminating  the  value  of  the  separated  milk, 
will  work  out  as  follows  : — 
Per  lb. 
s.  d. 
Eed  Poll  and  Welsh 2 0 
Shorthorn,  Lincoln  Eed  Shorthorn,  and  Ayrshire  . . 110 
South  Devon,  Kerry,  and  Dexter 1 8| 
Longhorn 16 
Guernsey  .........  1 If 
Jersey t 
