TEST WEIGHT OF GRAIN '. ACCURACY OF TESTING APPARATUS. 3 
of wheat for commercial purposes. The chart in figure 3 shows 
graphically the number of quarts of grain for various test weights 
required to weigh the number of pounds fixed by law as a bushel for 
various grains. 1 
NUM8ER OF QUARTS PER 60P0UNP5 f LEGAL BUSHEL, BV WEI6HT, OF WHEAT) 
O 5 /O IS 20 25 JO 32+ 35 4Q 
TESTkUE/6HTf4 LBS. 
.. g£ .. 
» 60 « 
- S8 ■ 
■■ 56 • 
- 54 ■ 
» 52 - 
- 50 « 
25 
— \— 
30.0 \OTS. 
3/.O-0T5. 
I 
32. QT5. 
33./+QT5. 
34.3- pTS. 
I 
35.6+ 0T5. 
36.9+ QTS. 
\3a>? Q75. 
Fig. 2. 
* 32 QUARTS EOUAL /BUSHEL BV VOLUME 
-Comparison of the volume of 60 pounds of 
'heat of various test weights. 
The standard weight-per-bushel tester is so designed that when the 
kettle is properly filled and struck off it contains exactly 1 dry quart. 
Test Weight per Sushel 
20 22 Zh 26 28 30 32 31+ 36 38 1+0 M-2 ^4- 1+6 1+6 50 52 51+ 56 58 60 62 6l+ 
50 
J+8 
\ 
V- 
\ 
1 
\ 
\ 
\ 
"\ 
111 
1-^ 
1|0 
\ r 
-> \ 
J5fl 
\ 
" 
k* 
^v ^ 
if 
\' < 
' TV-* 
^. 
s^ 
c^ 
i \. 
3? 
^ , - 
^ 
L. 
.<r 
- 1 1 1 i 
^ 
28 
?6 
. Legal Weight per Bushel. 
OATS 32 POUNDS 
BARLEY 4-8 
CORN £6 
RYE S6 
FLAX S6 " 
\ 
s 
^v 
2f 
^ 
20 
wt 
£A 
r < 
?0 
" 
Fig. 3. 
-The number of quarts, by measure, of grain of various test weights required for 
a '" legal bushel " by weight. 
or 67.2 cubic inches. When the filled kettle is hung on its proper 
hook on the short end of the beam of the official testing apparatus, 
1 Milling and baking tests conducted by this bureau and by other authorities have 
furnished conclusive proof that 60 pounds of wheat which has a high test weight per 
bushel, say 60 pounds, will yield more flour of better quality than can be obtained from 60 
pounds of wheat which has a lower test weight per bushel, as for instance. 4S pounds. 
