FEMDti i43

TABLE VI.—-AVERAGE COMPOSITION OF PRINCIPAL CEHKALB

Wheat
Bur-ley
Rye
OatH
Itiee
( Jorn
Millet,
Buckwheat

Water .............
13.05
13.77
15. 00
12 . 37
13. 11
13. 12
11.00
12.93

Crude protein (Nitro-

gen CUB 8 U b-

Htanren) ....... .
12.35
11. 14
1 1 . 52
10.41
7 . 85
9 . 85
9.25
10.30

("rude fat .........
1 , 75
2. 10
1 . 71)
5.32
O.H8
4 . 02
3 . 50
2. HI

Sugar ...... . ......
I 45
1 50
0 95
1 91

2 40

Gum and dextrin. . .
2 . 38
1 . 70
4 . SO
1.79
16.52
3 . 3S
05.95
55. SI

Starch .......... ...
(54 . OS
01 (57
(32 00
54 OS

02 57

2 53
5 31
2 01
1 1 1 9
0 03
2 29
7 29
10 43

Ash
1 XI
2 09
1 SI
3 02
• >.u~
1 01
1 5 1
2 3f>
2 72

Method of Sampling. -Commercial feeds are usually shipped
to the consumer in sacks and it is important that the samples
chosen from them shall be representative of the feed contained
in all parts of the sack. A sample^*somewhat similar to that
used for fertilizers (Fig. 59, page 273), but larger in diameter than
this, may be forced to the bottom of the sack of feed, the slide
covering the opening in the tube being moved to the* side and
tapped so that the tube can fill with feed. The slide is again
closed, the tube is withdrawn from the feed suck, and the con-
tents of the sampler placed on a sheet of paper and thoroughly
mixed. About a pint of this uniformly mixed feed is wived for
analysis.

Preparation of Sample.™The sample should be ground in a
feed grinder (Fig. 40, suitable for grinding course feed materials)
BO that it will pans a sieve having openings I mm in diameter
(0.04 in). Sometimes it in quite difficult to reduce it to thin
degree by grinding, in which case it should be, made an fine an
possible by any other available means. A container which
may be tightly stoppered should be provided to hold the sample.
At the start, enough should be prepared and mixed to serve for
the entire analysis. This will require about 200 gm.

Moisture.—There are several minor factors which tend lo
modify the results of moisture tleterrnmationH. One of UKJHO

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