58 
Dairy  Cattle  and  the  Butter  Test. 
single  animal.  We  would  suggest,  thei’efure,  that  a sample 
of  milk  from  a single  animal,  known  to  give  a bad  churning 
milk,  if  obtainable,  should  be  carefully  analysed  and  the 
results  of  the  analysis  compared  with  the  analysis  of  a similar 
sample  of  good  churnability. 
Finally,  we  would  say  that  the  casual  microscopic  examin- 
ation of  a milk,  with  a view  to  the  determination  of  the 
character  of  its  fat-globules  is,  in  our  opinion,  of  little  use, 
as  deductions  based  upon  visual  observation  only  are  apt  to 
be  erroneous.  That  this  is  so  will  be  admitted  if  one  attempts 
to  classify  the  photomicrographs  of  the  different  milks  in 
order  of  coarseness  or  fineness  of  globule  and  then  compares 
the  results  with  Table  V. 
If  the  photographs  (Figs.  1-13)  and  the  explanatory  tables  in 
the  report  from  the  Cooper  Research  Laboratory  at  Watford  are 
carefully  studied,  the  reader  cannot  but  be  struck  with  the 
excellence  of  the  former  and  with  the  enormous  amount  of 
work  bestowed  on  them  and  on  the  whole  subject  as  dis- 
closed in  the  latter.  The  photographs  are,  I believe,  unique,  as 
I am  not  aware  that  the  milks  of  all  the  British  Dairy  Breeds 
of  cattle  have  ever  been  taken  on  so  large  a scale,  although 
D’Hont  showed  plates  of  the  milks  of  several  of  the  foreign 
breeds,  and  included  with  them  the  Jersey  and  the  Durham. 
Speaking  for  myself,  I can  never  forget  the  interest  that 
Messrs.  Robinson  and  Nuttall  took  in  the  subject  from  the 
very  commencement,  and  the  consideration  and  courtesy  with 
which  they  listened  to  my  suggestions,  and  the  kindly  and 
willing  help  they  have  given  me  throughout. 
To  them  and  to  Mr.  W.  F.  Cooper  I feel  that  the  Society 
is  much  indebted. 
In  D’ Hunt’s  article  on  the  fat  globules  in  milk  (see  page 
47),  he  divides  the  different  breeds  into  three  classes  : — 
“Breeds  with  small  globules,” 
“ Breeds  with  medium  globules,” 
“ Breeds  with  large  globules,” 
and  he  places  the  Jersey  and  the  Durham  (Shorthorn)  among 
the  breeds  with  large  globules. 
In  Professor  Sheldon’s  Book  of  the  Dairy,  the  cream 
globules  in  Ayrshire  milk  are  said  to  be  smaller  than  those 
in  Jersey  milk. 
In  both  cases  the  milks  examined  were  probably  the  produce 
from  a single  animal,  as  the  globules  shown  in  the  mixed 
milks  of  these  breeds  do  not  exhibit  such  marked  differences. 
If  D’Hont’s  division  be  adopted,  it  would  appear  as  if 
milk  from  the  Lincolnshire  Red  Shorthorns  is  the  only  one 
that  can  be  placed  in  the  division  of  “ breeds  with  large 
