EXPERIMENTAL MILLING AND BAKING. 5 
the grain-grading equipment described in United States Department 
of Agriculture. Handbook. Form 90, of Official Grain Standards is used. 
The mechanical analysis in reality begins as soon as the sample is 
received at the laboratory, at which time it is examined for odor, 
temperature, and the presence of live insects. The analysis for the 
other grading factors namely, dockage, test weight per bushel, mois- 
ture, damaged kernels, foreign material other than dockage, smut. 
kernel texture, and wheats of other classes, is made just preceding the 
milling test, and if the sample has been in storage for some time 
before milling, a second examination for odor, temperature, and 
insects is made at this time. The results of these examinations are 
entered in their respective places on the laboratory card. 
Preparatory to making this analysis two portions are taken from 
the original sample by use of the Boerner sampling device. 2 One 
Coupon NQ4 
2-^** 
n 
<t\ 
in 1000 gn 
as — 
Moijture: fa) 7_.. 
Av Z ■ 
.% 
Doekaje: SteTe_r^TT;•. % Macluae. 
EsU: After removal of doekajs: 
.'ran: d"*ka?8: <t) _. (S) 
_J& 
JL 
Distinctly low < 
Weignt per 1 
X. &..%. Ibe. After iKtxtfj.J.Wx. 
Other than heat ij..Y... 
ITta! damage _ \JtM-... . 
Tcul F. M. other than dockage .^..+ L:L. 
Cereal palm _ £_\Z. 
jI3l 
(A) O 
r t J?/ nm ' 
r / 
7 
/ 
i / 
...... jfc... 
■ L 
.....1... 
... v.. 
t 
^«J.& M, torn \Viute.. -. 
| " 'C) r-rcm* *.?...— 
-rS— ArUn* VL&k^&XSL. 
...\1..,.. II. S. Crude, j 
Analtso or Siuptt as XlmtD. 
Mlfa 
Analyst* computed (date. 
^L*i?.r»ffi>r> 
Fig. 2.— Laboratory card (face side). (Size, 5 by 8 inches.) 
portion, approximately 1,000 grams, is used in determining the 
amount of dockage present and as a basis for the analysis of other 
factors used in grading in accordance with ordinary inspection prac- 
tice. After these analyses are made this portion is combined with 
the remainder of the sample for use in milling. The other portion. 
approximately 4 ounces, is put in a glass bottle and filed in racks in 
the storeroom. This bottled portion is kept as a permanent file 
record of the sample in its original form. Figure 5 illustrates the type 
of bottles and racks used for this purpose. 
The permanent file samples are identified by slips of paper bearing 
the laboratory number and placed inside the bottle. The bottles are 
arranged in numerical order in the racks. 
The attention given to the examination of the physical characters 
or condition of the sample of grain preparatory to making a milling 
3 Described in United States Department of Agriculture, Bulletin 287; A device for sampling grain, seeds, 
and other material, bv E. G. Boerner, 1915. 
