8 BULLETIN 788, U. S. DEPARTMENT OF AGRICULTURE. 
beginning of the milling process, a close similarity existed in the 
amounts of moisture contained in the respective sizings and middlings 
streams of the three mills. 
LOSS OF MOISTURE DURING GRINDING. 
The effect of the grinding on the moisture content of wheat and 
various kinds of roll stock is shown in part 2 of Table II as the differ- 
MOISTURE CONTENT~— PER CENT 
— _- — = 
= e ® 
SS ee WHEAT BEFORE TEMPERING 
an PS as ef ccd fe 
WHEAT AFTER TEMPERING 
2"° BREAK CHUNK 
3°° BREAK 
3° BREAK CHUNK 
4™ BREAK 
4™ BREAK CHUNK 
57 BREAK 
6™ BREAK 
I* SIZINGS 
2"° SIZINGS 
3° SIZINGS GRADE (A) 
3°° SIZINGS GRADE (8) 
30 BREAK SIZINGS 
1ST MIDDLINGS GRADE (A) 
187 MIDDLINGS GRADE (8) 
\8™ MIDDLINGS GRADE (C) 
1ST PIDDLINGS GRADE (0) 
IST MIDDLINGS- GRADE (E) 
1S’ MIDDLINGS GRADE (F) 
2"° MIDDLINGS GRADE (A) 
2° MIDDLINGS GRADE (B) 
2"°MIDDLINGS GRADE (C) 
2"0 MIDDLINGS GRANULATOR 
3*° MIDDLINGS GRADE (A) 
30 MIDDLINGS GRADE (8) 
3*0 MIDDLINGS GRANULATOR 
4™MIDDLINGS GRADE (A) 
4™MIDDOLINGS GRADE (8) 
57 MIDDLINGS GRADE (A) 
574 M!IDDLINGS GRADE (B) 
6™* MIDDLINGS 
7™ MIDDLINGS 
q 
5 137 TAILINGS GRADE (A) 
ee ee ee 
22220) 2*° TAILINGS GRADE (A) 
(RRR FRY DD a Ra Pc Pa 8 Be WY TFs ee 
(RPE 8 sa aes mer a Le eal Fs 
TtMiwW 
HIOLS 
15ST LOW GRADE 
a 8 a TWO A 20 LOW GRADE 
0 eee Fe ee ee Mic RADE 
Fic. 1.—Diagram showing differences in the moisture content of streams 
of mill stock going to the various rolls. 
ence between the moisture content of the streams before and after 
grinding. The average decrease for all grinding operations was 
0.392 per cent for mill No. 1; 0.340 per cent for mill No. 2; and 0.370 
per cent for mill No. 3. The average decrease, however, among the 
three mills, for that portion of the grinding operations known as the 
breaks, varied considerably, being 0.482 per cent for mill No. 1; 
0.270 per cent for mill No. 2; and 0.135 per cent for mill No. 3. 
This wide range between mill No. 1 and the other mills was possibly 
ri 
