Milk  and  Butter  Tests  at  the  Gloucester  Show,  1909.  235 
The  results  as  disclosed  by  the  Tintometer  are  as  below  : — 
Glasses  used 
Colours  developed 
Percentage 
of  Orange 
to  Yellow 
Bed 
Yellow 
Orange 
Yellow 
Jersey  Butter  . 
2-i 
6-2 
2-4 
3-8 
63- 1 
Shop  Butter 
2-4 
5-6 
2-4 
3-2 
750 
Margarine 
2-5 
5-8 
2-5 
3-3 
75-7 
Taking  the  first  lot,  2'4  of  red  when  combined  with  24 
of  yellow  developes  24  orange.  Deducting  the  24  yellow 
which,  combined  with  the  24  red  made  the  24  orange, 
from  the  original  6‘2  yellow,  3’8  is  left  as  the  residue  of  the 
yellow  colour. 
The  percentage  of  orange  to  yellow  in  the  Jersey  butter 
therefore  works  out  at  634. 
To  the  ordinary  observer  the  Jersey  butter  appeared  the 
deeper  in  colour,  but  the  Tintometer  showed  that  the  per- 
centage of  orange  in  the  genuine  butter  was  less  than  in 
the  margarine,  and  also  that  the  shop  butter  was  evidently 
coloured  with  similar  material  to  that  in  the  margarine. 
To  those  who  are  familiar  with  the  appearance  of  annato 
and  other  butter  colouring  preparations,  this  revelation  will 
not  come  as  a surprise. 
•Subsequently  to  this,  samples  of  butter  made  in  the  dairy 
at  Gloucester  from  the  milks  of  certain  breeds  of  cattle  were 
sent  to  Mr.  Lovibond  for  examination.  These  were  examined 
by  him  with  the  three  dominant  coloured  glasses,  red,  yellow, 
and  blue,  and  the  developed  coloured  measurements  and 
percentages  are  shown  in  the  following  table. 
Colour  Measurements  op  Butter. 
Breed 
Colours  Developed 
Percentage 
of 
Black  to  Orarge 
Percentage 
of 
Black  to  Yellow 
Black 
Orange 
YeUow 
Shorthorn 
•08 
•98 
103 
7-54 
7-08 
Lincoln.  Red  do. 
•035 
114 
1-5 
2-97 
2-27 
Devon 
•023 
113 
1-45 
216 
107 
South  Devon  . 
•013 
1-05 
1-56 
1-22 
•826 
Ayrshire 
•056 
1-03 
1-45 
5^15 
3-65 
Longhorn 
•04 
1-14 
1-21 
3-39 
3-2 
Gloucester 
•046 
•9 
1-45 
4-86 
•307 
Jersey 
•045 
1-33 
213 
3-27 
2-99 
Guernsey 
•016 
1-51 
2-8 
1-04 
•56 
Kerry 
•02 
•89 
1-2 
2-18 
1-64 
Dexter  . 
•023 
•79 
•88 
2-82 
2-54 
Shop  Butter  . 
•880 
•73 
2-35 
64-65 
2-72 
Margarine 
•440 
•89 
1-76 
30-76 
2-0 
