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Handbook: 8 of 287
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were removed to a mezzanine gallery. Thirty per cent of the area
of the store was reclaimed for business purposes.
In apartment buildings the introduction of
Luxfer Prisms in the entire openings will at once be seen to be
desirable, for the reason that where these apartment buildings are
crowded together, dressing rooms and bath rooms oftentimes open
directly opposite, and privacy is not secured even by the use
of dark shades keeping out the light. Where Luxfer Prisms have
been installed, rooms where it was previously necessary to use
dark shades and burn lights are now filled with beautiful daylight
without obstruction, securing perfect privacy.
The benefits to health to be derived from
the reduction of gas burning and consequent fumes, can hardly be
overestimated. Luxfer Prisms, without any cost of maintenance,
displace gas and electric lights, and in their place give pure,
healthful light. It will be found that in buildings from 150
to 200 feet deep, in the middle of the block, where light shafts
are used, these shafts can be entirely dispensed with by the use
of Luxfer Prisms in the front and rear. In a building recently
finished the plans originally showed a light shaft in the middle
of the building. When the architects' attention was brought to
Luxfer Prisms, they omitted this. These prisms were introduced
in front and rear elevation, and the light thus secured
throughout the seven stories is more than ten times as bright
as it would have been had the shafts been built as originally
planned. Another practical advantage in this case is the
additional income paying floor space of forty-six hundred square
feet, which otherwise could not have been used. The cost of the
building was reduced, the expense of the Luxfer Prisms used
being substantially less than the estimated cost of the walls
to enclose the light shaft.
It will be found that the large light
courts heretofore designed may be much reduced in size when
Luxfer Prisms are used. For example: One court in a large Chicago
building, built sixty-seven feet square, might have been reduced
to forty-five feet square had Luxfer Prisms been known when the
design was made, and yet the rooms deriving light from that
court would all of them be very much better lighted if equipped
with Luxfer Prisms on the smaller shaft than
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