MICROSCOPICAL EXAMINATION OF FLOUR. 21 
Table 21. — Limitations and average counts on bran particles and hairs for patent flours. 
Commercial grade. 
Bran particles. 
Hairs. 
Variation. 
Average. 
Variation. 
Average. 
Hard-wheat patent 
13 to 72 
19 to 133 
18 to 83 
30 
49 
42 
2to45 
lto34 
13 to 40 
18 
20 
Blended- wheat patent 
21 
STRAIGHT FLOURS. 
When only one grade of flour is manufactured in the mill, this 
grade is commercially designated as a straight flour, if it contains the 
entire flour content of the wheat that it is possible to mill. It might 
be considered to contain all of the flour that could be obtained from 
the wheat kernel with the exception of a certain percentage of so- 
called low-grade or red dog flour. Such a straight flour naturally 
would contain more of the branny particles from the wheat kernel 
than would a patent flour. The practice of compositing such a flour 
apparently varies in different mills. Tests were made upon a large 
number of straight flours milled from hard, soft, and blended wheats. 
The detailed information on these tests is given in the following para- 
graphs. 
STRAIGHT FLOURS MILLED FROM HARD WHEATS. 
Seventeen straight flours reported as having been milled from 
hard wheats were examined for their offal content. The com- 
mercial grades ranged from 92 to 100 per cent. The results of the 
examination appear in Table 22. 
Table 22. — Results of examination of straight flours milled from hard wheats. 
Sample No. 
Com- 
mercial 
. grade. 
Bleached. 
Bran 
particles. 
Hairs. 
Total. 
15196-K-U 
"Per cent 
straight." 
92 
95 
95 
96 
97 
m 
98 
98 
98 
98 
98 
98 
98 
98 
100 
100 
100 
No 
33 
71 
50 
89 
37 
57 
62 
55 
58 
62 
71 
63 
57 
71 
76 
60 
121 
34 
55 
45 
33 
25 
39 
31 
51 
61 
87 
65 
19 
26 
47 
61 
17 
22 
67 
11028-K-E 
(?) 
126 
17157-L-B 
Yes.. , 
95 
17155-L-HH 
Yes 
122 
15154-K-C 
Yes 
62 
15106-K 
(?) 
96 
11067-K 
(?)... 
93 
15136-K-B B 
Yes 
106 
15147-K 
Yes... 
119 
15191-K 
(?) 
149 
15194-K-U 
Yes... 
136 
17113-L 
Yes 
82 
17152-L-Y 
(?) 
83 
17177-L-XX 
No.... 
118 
11073-K-GG 
(?) 
137 
17146-L-F. . 
No. 
77 
17186-L-F 
No 
143 
The count obtained on bran particles ranged from 33 to 121 and 
that on hairs from 17 to 87. The average bran particle count was 
64 and the average hair count 43. The total offal count ranged 
from 62 to 149, with an average of 106. 
