S. M. DAS GUPTA                              257

                                        TABLE II —contd.

Month of preparation

No. of
samples

R. W.
(Mean of
2 values)

I.N.
(Mean of
2 values)

Carotene
(Y. U.)
per grm.

Vitamin-A
(B. U.)
per grm.

February— contd.

6

28.2

34.6

5.9

8.6

7

27.6

34.7

4.8

8.8

8

27.2

35.5

4.6

7.6

9

29.2

33.4

5.2

6.3

10

26.9

35.8

5.6

6.8

11

27.0

35.3

5.8

7.2

12

30.8

31.2

8.6

8.2

13

26.2

35.2

6.3

8.5

14

27.2

36.8

6.4

8.8

15

27.1

35.8

5.2

7.8

In order to be sure of the results obtained in this paper, the butter from a
a single cow (Sundari) during September to January had been analysed. These
were clarified at 50° C. in an air oven in the laboratory. During September
and October, the cow mainly lived upon straw-chops whereas during November
to January she had been on pasturage during the day time.

                                        TABLE III

Results of analyses of samples of cow's butter-fats made from the composite
         milk of a single cow, aged 4 years 6 months and having its last calving in
         June 1937.

(The milks were collected after a week. During September and October 1937, the
Cow mainly lived on paddy-straw. From November, the cow was put out to grass
till January, 1938.)

Month

No. of
samples

R.W.
(Mean of
2 values)

I.N.
(Mean of
2 values)

Carotene
(Y. U.)
per grm.

Vitamin-A
(B. U.)
per grm.

September . . .

1

24.2

35.6

1.2

3.2

2

25.7

34.4

1.6

3.6

3

23.8

36.1

0.8

3.8

4

24.7

26.3

1.8

2.6

October . . . .

1

22.6

38.8

2.4

4.8

2

21.8

39.6

2.6

5.2

3

21.4

38.8

1.0

2.8

November . . .

1

29.8

33.1

4.8

8.6

2

28.6

32.1

5.6

8.2

3

27.2

35.4

5.8

8.8

December . . .

1

26.6

36.0

5.4

6.4

2

26.8

36.2

4.4

6.8

January . . . .

1

25.2

36.6

4.8

5.8

2

24.2

36.8

2.6

4.6