A MODIFIED BOERNER SAMPLER. 7 
in a shallow sheet and is divided into as many streams as there are 
spaces between the partitions at the base of the cone. As every 
alternate stream falls into one pan, and the intermediate streams are 
diverted into the other pan, the sample will be divided into ap- 
proximately equal parts. In order to further divide the sample, it 
will be necessary only to close the gate and pour the contents of one 
of the pans—the lower pan will be found to be more convenient to 
use for this purpose—into the hopper, replace the pan, open the gate, 
and let that half of the original sample run through the device 
again. This action can be repeated, pouring always from the same 
pan, until the quantity of the sample deposited in one pan is the 
amount desired for analysis. By various combinations, pouring from 
Fig. 4.—A, Botton view of lower cylinder, showing spout at bottom of funnel and 
shield surrounding this spout. B, Bottom view, upper cylinder, showing bottom of 
hopper with gate open. 
the same pan every time, as described, or by sometimes using the 
other, almost any desired size of sample can be obtained,’ provided 
the entire contents of the pan being emptied are poured into the upper 
hopper each time. 
For instance, if the weight of the original sample is 1,000 grams, 
and it is desired to obtain approximately 30 grams for analysis, the 
sample should be poured through, or “ cut ” as it is commonly called, 
five times. The first cut starts with 1,000 grams, giving 500 grams 
in each pan; the second cut starts with 500 grams, giving 250 grams 
in the pan just emptied, and 750 grams in the other; the third cut 
1U. S. Department of Agriculture Bulletin 574 will be found convenient for use in 
grain grading in connection with this apparatus, as it contains tables of the conversion of 
the weights of mechanical separations of grains into percentages. 
