Scientific American Supplement, No. 303, October 22, 1881Various
Science
Scientific American Supplement, No. 303, October 22, 1881
Various
Science -- Periodicals
When it comes to the machinery to be employed in making the reductions
or breaks, the miller has several styles from which to choose. Which is
best comes under the head of what I don't know, and moreover, of that
which I have found no one else who does know. Each machine has its good
points, and the mill owner must make his own decision as to which is
best suited to his purpose. The main principles involved are to abrade
the bran as little as possible while cleaning it thoroughly, and to make
as little break flour, and as many middlings as possible, the latter to
be made in such shape as to be the most easily purified. Regarding
the difference between spring and winter wheat for gradual reduction
milling, it may be stated something after this manner: Spring wheat
has a thinner and more tender bran, makes more middlings because it is
harder, and for the same reason the flour is more inclined to be coarse
and granular. In milling with winter wheat, especially the better
varieties, there will be more break flour made, the middlings will be
finer with fewer bran specks, and the bran more easily cleaned, because
it will stand harsher treatment. Winter wheat, moreover, requires more
careful handling in making the breaks, not because of the bran, but to
avoid breaking down the middlings, and making too much and too fine and
soft break flour. In order to keep the flour sharp and granular, coarser
cloths are used in bolting, and because the middlings are finer the
bolting is not so free and a larger bolting surface is required. In
milling either spring or winter wheat there should be ample purifying
capacity, it being very unwise to limit the number of machines, so that
any of them will be overtaxed. The day has gone by when one purifier
will take care of all the middlings in the mill.
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