Canopies are used where the opening to be lighted
is opposite site and far below the sky-lines of immediate surrounding
buildings, as it is then necessary that the receiving surface of the prism
plate be upturned to the light of the sky.
The use of the canopy has an incidental practical
value in protecting show windows and dispensing with awnings, and they may
be made attractive and useful features over entrances to public buildings
or private dwellings. Continuous canopies are sometimes made protecting
the sidewalk and throwing an immense volume of light into the first story
of an entire building.
The prisms in a canopy are oftentimes arranged in
groups; the side groups, which may be outside the line of the opening,
are put in so that the lines of the prisms are diagonal, throwing the
light to one side of the room. In some instances in this way alone
can some of the best results be obtained, as a larger volume of light
than would otherwise be permitted by the size of the opening can be
utilized. In some cases it is desirable to provide the canopy with
a vertical or sloping side portion, the whole assuming the form of
a hood over the opening.
In connection with the window plates, foriluxes
and canopies, very beautiful effects are secured by the use of the
Iridian product. The receiving surface thus shows a rich, substantial
texture, sparkling both inside and outside with an irradiation of
crystal lines and forms. New effects and possibilities are steadily
developing in the artistic treatment of this material.
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