BULLETIN 287, U. S. DEPARTMENT OE AGBICTJLTTJRE. 



As the widths of the ducts are equal to the widths of the spaces 

 between the ducts, it follows that the material falling on the cone is 

 separated into approximately equal parts, one-half passing through 

 the spaces and the other half passing through the ducts. All of the 

 material which falls into the spaces is spouted into one of the recep- 

 tacles, while all of the material 

 which falls into the ducts is spouted 

 into the second receptacle. 



If it is desired to obtain a smaller 

 part of the original amount of ma- 

 terial than one-half, it is only neces- 

 sary to return to the hopper the 

 material which falls into either of 

 the receptacles and run such ma- 

 terial through the device again, re- 

 peating such action as often as it 

 may be necessary to procure a sam- 

 ple sufficiently small for the purpose 

 desired; or the same result may be 

 obtained by building up a series of 

 superimposed devices of the kind 

 described, so that the lower device 

 will receive only the material which 

 is spouted from one of the funnels. 

 If it is desired to obtain a small 

 sample from & very large quantity 

 of material, as, for instance, from 

 either a carload or cargo of grain, 

 as the grain is being loaded into 

 or discharged from a car or vessel, 

 then the construction of the device 

 can be altered by widening the space 

 between the ducts so that any frac- 

 tion of the material entering the hopper can be made to pass into 

 the ducts and inner funnel, and by superimposing two or more de- 

 vices, one above the other, the portion taken out by the ducts in each 

 device will reduce the original material very rapidly 

 to a sample of any size required. 



The device can also be used for blending two or 

 more streams of wheat or other grain going to the 

 rolls of a mill or mills. If it is used to blend two or 

 more streams of (say) wheat of different varieties or 

 grades, it is only necessary to spout each stream into 

 the hopper and to bring the two resulting streams 

 together again before the mixture enters the rolls of 

 the mill. To supply two sets of rolls with (lie same 

 blend, each stream as it leaves the device should bo 

 run to a separate set of rolls. Ifil is desired to run the 

 blend to four sets of rolls, then it would be necessary 

 to place another device under each spoutof the upper <lrv i<c and run the 

 grain from each of the four resulting streams to a separate set of rolls. 



Note. — Application has been made for a patent covering this device; If patenl i- 

 allowed it will be donated to tin' people of the United States, 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 



Fig. 5. — Side view of the sampling device, show- 

 ing one leg placed on the left side halfway be- 

 tween the two receptacles. 



Fig. 6. — Top view of 

 inn- nf the recepta- 

 cles into which the 

 material to be sam- 

 pled is spouted. 



