10 BULLETIX 168, U. s. DEPARTMENT OF AGEICULTUEE. 
cases, when exainining white corn it ^^'ill not be necessary to make 
weighings unless there are more than 5 kernels of corn of other 
colors, and on yellow corn, unless there are more than 12 kernels of 
Pig. 8.— •■Cracked" corn, consisting of niece? of kernels which v, ill pass through the sieve v.-ith the 
quarter-inch perforations. (Natural size.) 
other coloi-s, in a 100-gram sample, as 5 kernels will usually be less 
than 2 per cent and 12 kernels less than 5 per cent. 
More difficult problems arise, however, in dealing with special 
types or varieties of corn or with individual kernels, such as ''straw- 
PiG. 9.— Small whole kernels which wUI pass through the sieve with the quarter-inch perforations, 
but which should not be classed as ''cracked" corn. (Natural si/.e.) 
colored,^' ''red-cast" yellow, etc., which are difficult to classify. i\.t 
most, such classifications can be only arbitrary and in keepmg with 
the best commercial practices. In order to bring about the greatest 
uniformity of apphcation, some of the more important types of ker- 
nels from the standpoint of color are shown in Plate I in natural 
