8 
BULLETIN 1187, U. S. DEPARTMENT OF AGRICULTURE. 
In addition to furnishing data for use in connection with grain 
standardization and breeding work, an experimental mill of this type 
can be used for obtaining milling information valuable to the operative 
miller. Subjects of this nature, which may be investigated, include 
the best way to temper or condition various types of wheat, the effect 
of the fineness of granulation on the baking quality of flour, the effect 
of various systems of flow on the quantity and quality of the finished 
product, and the effect of atmospheric humidity on milling efficiency 
and quality of products. 
6 "<>at kicker" used in cleaning sampl< 
PREPARATION FOR MILLING. 
Before the actual grinding or milling of a sample begins certain 
preparatory operations must be performed. First, the sample must 
be cut down to a size appropriate for making the test; this is done on 
a Boerner sampler. If the sample does not contain more than 5 per 
cent of foreign material, the size to which it is cut is 1,900 grams. If 
a considerable amount of foreign material is present, a greater number 
of grams is taken so that after the screenings and scourings are 
removed and a 200-gram portion for moisture determination taken 
out, at least 1,500 grams will remain for milling. 
