UNITED STATES DEPARTMENT OF AGRICULTURE 
Contribution from the Bureau of Markets 
GEORGE LIVINGSTON, Acting Chief 
Washington, D. C. PROFESSIONAL PAPER June 25, 1920 
A MODIFIED BOERNER SAMPLER. 
By E. G. BoeRner, In Charge, Grain Investigations, and E. H. Rorrs, Specialist 
in Grain Investigations. 
CONTENTS. 
Page. Page. 
NCO Chine ee eee arene 1 | How to obtain the sampler________ 8 
IDEKeuh nao ee 4 We Care ,OL athe G2 vicen a ee ae 8 
OperaAtiO nye = Se Se ea es G : 
INTRODUCTION. 
The device described in this bulletin was developed primarily to 
meet the demands of grain dealers and laboratory workers for a 
cheap and simple method of securing from a larger sample to be 
graded a smaller representative portion of grain for testing and 
analyses purposes. Another application of the device, which should 
be of special interest to the grain trade, is that a sample can be 
divided into two or more representative parts, so that one representa- 
tive part may be used for testing and grading and the other part or 
parts may be turned over to the seller or the buyer of the grain, or 
retained for future reference. It can also be used for reducing the 
size of samples of seeds, flour, meal, feeds, or any other material of 
like kind for examination or analyses. This device should be of 
special interest to country grain dealers. A phantom view of the 
device completely assembled in operation is shown in figure 1. 
The device (commonly known to the trade as the “ Boerner Sam- 
pler ”) described in Department of Agriculture Bulletin No. 287 was 
developed primarily for the purpose of dividing an original sample 
into smaller portions, which might be analyzed without the undue 
loss of time incident to handling a large sample, and to make this ° 
division in such a manner that each small portion would correctly 
retain the original proportion of the various factors comprising the 
170658°—Bull. 857—20 
