Agricultural  Education  Exhibition,  1910.  223 
From  the  above  it  will  be  seen  that  the  black  in  the 
colouring  material  used  (“  annato  ”)  dies  out  as  density  in- 
creases, whilst  the  black  in  the  milk  increases  in  density  under 
the  same  conditions. 
The  decrease  of  black  percentage  between  the  Devon  and 
the  coloured  milk  points  to  the  use  of  a colouring  material 
purer  in  colour  than  the  milk,  whilst  the  increase  in  the 
percentage  of  black  in  the  separated  milk  when  compared  with 
the  Devon  is  what  would  be  expected  when  the  butter  fat  has 
been  abstracted. 
It  is  submitted  that  this  experiment  goes  to  show  that 
colour  measurements  by  the  Tintometer  disclose  (what  cannot 
be  determined  by  ordinary  vision)  the  presence  of  an  added 
colour  material  to  separated  milk. 
Ernest  Mathews. 
Little  Shardeloes, 
Amersham,  Bucks. 
AGRICULTURAL  EDUCATION  EXHIBITION. 
This  section,  over  which  Mr.  Bowen-Jones  once  again 
presided  as  Steward,  seemed  altogether  as  great  a success  as  on 
previous  occasions,  and  that  is  saying  a great  deal.  The 
Exhibition  being  in  the  north,  illustrations  dealing  with  live 
stock  took  a more  important  position  than  usual,  almost  every 
exhibit  from  the  north  of  England  or  the  “ Principality  ” 
showing  either  illustrations  of  work  done  on  “ breeding 
problems  ” or  pictures  of  typical  specimens  of  pure-bred 
animals,  or  sometimes  both.  It  is  particularly  pleasing  to  see 
that  our  Colleges  are  capable  of  producing  such  good  live 
stock  ; in  some  cases  highly  successful  show  specimens. 
Every  one  of  those  who  are  interested  in  the  struggles, 
financial  or  otherwise,  of  the  early  life  of  educational  agri- 
culture in  this  country,  can  well  realise  that  it  has  been  no 
easy  matter  for  those  responsible  to  obtain  and  maintain  a high 
standard  of  perfection  among  the  cattle,  sheep,  and  poultry 
upon  a College  farm.  Cattle  and  sheep  are  specified,  for  we 
noted  with  some  regret  the  absence  of  the  humble,  but  useful 
Pig- 
It  may,  however,  be  suggested  that  the  beautiful  illustrations 
that  were  presented  might  have  been  more  appreciated — they 
certainly  would  have  been  more  useful — had  they  been 
accompanied  by  some  data  concerning  the  breeding,  rearing, 
and  milk  production  of  the  animals  portrayed.  It  would,  for 
instance,  be  interesting  to  learn  the  rations  given,  the  weights 
obtained,  and  the  value  produced,  either  in  cash  or  through 
