The quantity of flour obtained from a given
amount of wheat must also be ascertained and its quality further tested
by means best known to millers, as regards "doughing-up," keeping
qualities, color, etc. And then the result can be no less than to show
what millers already knew--that the best quality of flour, commanding
the top prices in the market, cannot be obtained from an inferior
quality of wheat.--_Milling World._
* * * * *
APPARATUS FOR PRINTING BY THE BLUE PROCESS.[1]
[Footnote 1: Read June 21, 1882, before the Boston Society of
Civil Engineers.]
By CHANNING WHITAKER.
The blue process is well known to the members of the society, and I need
not take time to describe it; but with the ordinary blue process
printing frame the results are sometimes unsatisfactory, and now that
the process has come to be so commonly used I have thought that an
account of an inexpensive but efficient printing frame would be of
interest. The essential parts of the apparatus are its frame, its glass,
its pad or cushion, its clamps, and the mechanism by which the surface
of the glass can easily be made to take a position that is square with
the direction of the sun's rays.
_The Blue Process Printing Frame in Common Use.--Its Defects._--The pad
of the apparatus in common use consists of several thicknesses of
blanketing stretched upon a back board.
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