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Scientific American Supplement, No. 365, December 30, 1882 by Various
page 52 of 115 (45%)
worth more than fifty-five pounds. Again, the figures show that No. 3
contained nearly four times as much foreign matter as No. 1. Millers
certainly should not be expected to pay for foreign seeds or other
substances valueless for their purpose, at the price of wheat. Finally,
if the analysis proves anything, it proves that the lower grades contain
a decidedly larger percentage of components which it is generally
agreed, whether directly or the reverse, ought not to be incorporated
with the flour, and are, therefore, of comparatively little value to the
miller. This is shown by the relative amounts of cellulose, ash, and
phosphorus present. Cellulose, as every one knows, is the woody,
indigestible substance which is found in the bran, and the greater the
amount of cellulose, the heavier will be the bran in proportion to the
flour producing elements. According to the figures presented, No. 3
contained nearly one-quarter more cellulose than No. 1, while the amount
in No. 2 was slightly less than in No. 3. The ash, too, which represents
the mineral constituents of the wheat, is directly dependent upon the
quantity of bran. Here, too, the lowest grade is shown to yield about
one-quarter more than the highest. The larger percentage of phosphorus
in the lower grades is suggested by the analyst to indicate their
greater food value in this respect. So it would, were we in the habit of
boiling our wheat and heating it whole, or of using "whole wheat meal."
But, fortunately or unfortunately, the bread reformers have not yet
succeeded in inoculating any considerable portion of the community with
their doctrines, and hence the actual food value of any sample of wheat
must be ascertained, not directly from the composition of the wheat, but
from the composition of the flour made therefrom. Now, as already
stated, phosphorus, like the other mineral components, is found almost
entirely in the bran. Its presence in greater quantity, therefore,
simply adds to the testimony that a larger proportion of the low grade
wheat must be rejected than of the higher grade. It should be evident to
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