A MODIFIED BOERNER SAMPLER. 



stream of material falls into one pan, while the alternate streams are 



diverted into the other 

 (sample) into two 

 equal parts. The 

 separation of the 

 streams is accom- 

 plished by leaving 

 the openings be- 

 tween the radial 

 partitions unob- 

 structed in every 

 other space, and in 

 the alternate spaces, 

 between those left 

 clear, providing bot- 

 toms which, with 

 the partition as 

 sides, form diverting 

 ducts. The streams 

 of material passing 

 through the unob- 

 structed openings 

 fall directly into the 

 upper pan. The 

 streams passing 

 through the ducts 

 are diverted into a 

 funnel, shown in fig- 

 ure 4, which collects 

 the streams from all 

 the ducts and dis- 

 charges them as one 

 stream (which is 

 one-half of the 

 original material) 

 into the lower pan 

 through a protected 

 opening in the up- 

 per pan.. 



The upper pan, 

 illustrated in figure 

 5, is designed so that 

 it catches and holds 



pan, thus 



dividing 



the original material 



Fig. 2. — Side view of complete device. 



the half of the material passing through the unobstructed openings, 

 but permits the other half of the material, which has passed through 



