THE TEST WEIGHT OF GEAIN. 5 



PROPER METHOD OF FILLING THE TEST KETTLE. 



Table II gives the results obtained by filling the test kettle from a 

 hopper and shows the influence on the test weight per bushel of 

 (a) the height of the fall, or the distance of the hopper opening above 

 the test kettle, and (b) the size of the grain stream, or the diameter of 

 the hopper outlet opening. These data represent the average results 

 of 10 tests under each condition specified in the tests with the special 

 apparatus described in this bulletin. In making these tests three 

 hoppers were used, having outlet openings 1, 1-|-, and 1^ inches in 

 diameter, respectively. A large sample of each of the grains shown 

 in the table was split up into nine equal portions with a sampling 

 device 1 and mixed until each sample showed the same test weight 

 under the same conditions. 



Table II. — Test weight per bushel of different grains, showing the influence of 

 the height of fall and of the size of grain stream in filling the test kettle. 



[Average results of 10 tests under each condition described.] 



Grain and diameter of hop- 

 per opening. 



2 



inches. 



Flaxseed : 

 1 inch. . 

 1 | inches 

 li inches 



Milof 



1 inch. . 

 li inches 

 IV inches 



Wheat: 



1 inch.. 

 1 J inches 

 l| inches 



Rye: 



1 inch.. 

 1 J inches 

 li inches 



Rice, "rough: 

 1 inch., 

 li inches 

 li inches 



Test weight per 

 bushel (in 

 pounds) when the 

 distance o f t h e 

 hopper opening 

 above the kettle 

 was — 



52.34 

 52.34 

 52.35 



59.30 

 59.24 

 59.22 



61.20 

 61.14 

 61.08 



53.98 

 53.88 

 53.81 



43.33 

 43.15 



42.85 



3. 



inches. 



52.35 

 52.35 

 52.36 



59.39 

 59.31 

 59.26 



61.32 

 61.25 

 61.16 



54.12 

 54.00 

 53.92 



43.43 

 43.25 

 42.95 



4 

 inches. 



52.34 

 52.34 

 52.34 



59. 55 

 59.46 

 59.36 



61.45 

 61.34 

 61.20 



54.20 

 54.05 

 53.98 



43.61 



43.40 

 43.24 



Grain and diameter of hop- 

 per opening. 



Emmer: 

 1 inch.. 

 1 J inches 

 li inches 



Corn: 



1 inch. . 

 1J inches 

 l| inches 



Barley: 



1 inch.. 

 1} inches 

 li inches 



Oats:" 



1 inch. . 

 1\ inches 

 1J inches 



Test weight per 

 bushel (in 

 pounds) when the 

 distance o f t h e 

 hopper opening 

 above the kettle 



2 



3 



inches. 



inches. 



28.04 



28.54 



27.85 



28.25 



27.62 



28.05 



54.99 



55.50 



54.78 



55.28 



54.67 



55.08 



47.08 



47.35 



46.87 



47.10 



46.66 



46.86 



37.31 



37.65 



37.05 



37.25 



36.81 



37.01 



4 

 inches. 



28. 65 

 28. 4.3 

 28.26 



55.71 



55.44 

 55.29 



47.78 

 47.46 

 47.23 



38.03 

 37.67 

 37.35 



It will be observed that neither the height of fall nor the diameter 

 of the hopper outlet opening affects the test weight of flax to any 

 appreciable extent, but both factors have a decided and direct influ- 

 ence on the test weight of the other grains, the effect being more 

 noticeable with the large or loose-structured grains than with the 



1 The sampling device used in these experiments is explained in U. S. Department of 

 Agriculture Bulletin No. 287, by E. G. Boerner, entitled "A device for sampling grain, 

 seeds, and other material," issued Sept. 14, 1915. This device has been covered by a 

 public-service patent. 



