Annual Report for 19D8 of the Consulting Botanist. 309 
Society’s show at Lincoln in 1907, such a machine was exhibited 
which received special commendation from the judges. The 
manufacturer claims for it that it removes from clover seed the 
seeds of dodder, dock, and other weeds, light seeds, and all 
foreign matters. The seeds of our native dodder may be easily 
separated from red clover, but the larger grains of foreign 
dodders are more difficult to remove as these seeds are almost 
the same size as the clover seed. The more careful merchants 
do not purchase clover which contains these large dodder 
seeds. 
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Fig. 1.— Sample of red clover with the impurities separated. 
The photograph (Fig. 1) of a bad sample of red clover will 
convey to the eye some idea of the impurities that may be met 
with. The left side of the illustration shows a portion of the 
sample spread out on a white surface for examination. The 
red clover, of course, predominates in the sample, but the 
presence of other seeds may be detected by the naked eye from 
their form and size. The different impurities have been 
